not really, back when the GTP was stock, it ran 16.60s. I think they do 14.90s stock at lower altitudes.

LT1 camaros are also in the 16s around here. I also used to run a bone stock 5.0 TPI 85 trans am, ran 16.70s. Those are NAs though.

Boosted apps are affected equally the same IMO. The amount of oxygen in the air is still lesss, it doesnt matter if youre compressing it. its still compressed air with less oxygen in it.