My thought on it is simple:
If it's going to break, it's going to break. I'd rather it break NOW than later on...perhaps after the warranty expires.
With warranty denial claims - they have to PROVE it was your fault, and not bad worksmanship...
My car, which just hit around 425 on the odo...has seen the revlimiter a few times while I forgot that I was in auto-stick mode, and took off (oops!) - I'm not too concerned about it.
The more I drive it, the more power it seems to have. I chirped the tires in 3rd gear the other day. That little warning light came on (regarding loss of traction)
I can't beleive I debated between this car and a Mustang GT...ther's no contest IMHO now!