I rented a 2011 Cruz LT with the 1.4L Turbo 6sp auto. It was quick off the line due to it's extremely low first gear. I hit 20 mph if that. At about 50 mph and above, about any car would be able to pass it cause it was so slow. And the blow off valve sounded like plastic flapping around in the dash. Don't even get me started on the acceleration hesitation. Hit gas, now count 1, 2, ok, we're moving now. Accelerating from a standstill, it didn't seem to do it too bad, but from a 2 mph roll on up, it was really bad.

As for the windshield glass. I did a rough measurement of my 98 2 dr GTP and 98 4dr Regal and they're about the same. The 2 dr might just be at less of a pitch. I remember a bunch of times I could run the 2 dr GTP in rain and the water would just roll up and over the windshield. With the 4dr Regal in the same amount of rain, I would need to have the wipers on.