I wouldnt worry about it too much. My car does the same, when it went in for its service i told them about it and they couldnt find anything wrong. Seems to happen when the brakes get hot, which could be down to a build up of brake dust on the leading edge of the pad.
You probably just have some slight glazing on the pad/rotor surface that is causing the noise. Very common when you do repetetive light braking. Try slamming on the brakes to break through the built up glaze and the nosie should go away. Very common on many high performance brake systems.
yeah, i had the same issue (more of a hum rather than a squeak, really), and the dealer said to do the same thing. it seems to have resolved the problem by applying a strong brake press a couple times. the squeaking is nothing compared to a Ferrari 550. that car is known for its very annoying, high-pitched squealing, and there's apparently nothing you can really do about it except replace them with aftermarkets.
I for one didn't understand all of it but a lot of it made sense, it's a good read and explains some of it. If you read down a bit it states that some of the squeal wasn't necessarily just the pads but the rotor contact as well and that when they changed the metal the rotor was made out of halfway through the project it shifted the frequency of the squeal.. So it may not necessarily just be the brake pad but the rotor and pad together due to the high performance braking system it could be normal simply because of the material the brakes pads are made out and the kind of contact between the rotor due to the pads having a mix of materials the stock pads have. Either way the link is a good read.
Interesting paper - bottom line, as I guessed, is softer pads help reduce the high frequency squeal. Pity, as soft pads won't work as well in performance and track driving.
The Viper Poseurs made great strides in ruining that car. For example, the cam got milder to smooth the idle and reduce the noise made by the transmission gears caused by the rough idle (so less power). The brake pads got softer to fix brake squeal and so it's one stop to a customer in a Viper.
Let's not do that to the Gallardo, shall we? Go to a race track and listen to the cars in the paddock. They make all manner of inglorious noises when forced to trundle about at low speeds. But in their element on the track, the noises all get glorious and the driving experience . . . .
Brake squeal is NORMAL with high performance brakes and a much a badge of performance as exhaust noise. If others don't know that, so what?
I think it defeats the purpose of a "performance" car to change things to make them more convenient to drive it daily as the car is made for performance in the first place. After finishing the suspension on my daily it's hard as a rock and bumpy as all hell but I don't mind it a bit, I like the feeling that I'm driving something that handles better rather than stock suspension which is too soft and I know I can't go have as much fun with it. But did they really do that to the Viper? That's really too bad.
Don't even get me started on the poor Viper. Many changes were for the good, but it seems most people buy them because of the status and appearance and have no desire or idea how to drive them at speed (other than quick blasts on the open road where driving skills are unimportant). The DaimlerChrysler ownership of Dodge has not been a good think IMO, as (1) the Viper is now a red-headed stepchild behind the AMG cars, rather than a halo car; and (2) more conservative styling and mainstream appeal is apparently the goal.
For example, IMO the new Viper SRT-10 oiling system is defective for track work. High-G left hand manouvers cause the pickup to starve for oil. The Competition Coupe now has a modified oil pan to solve the problem, but I noticed the problem at MotorSport Ranch, the club at which I am a member. Dodge's response? I should not track my car!
My SRT is gone and I now have a Gallardo.
And I LIKE the brake squeal and am at work trying to track down still better brake pads for the track.
I remain concerned, though, that Lamborghini suffers from major poseur factor, too, I just hope the factory does not soften the car so much that it is outside the interest of the true enthusiast.