Yep - it's like sav suggested N1's are laggy.
They are only laggy if you run bigger cams chasing top end speed/power. My car was full boost by 3,000rpm and had 300awkw's by 4,500rpm. Hardly laggy. Consequently we were shifting before 8,000rpm too.
(but I run stock cams)
Good response and GOOD handling - and these cars will be quick around most tracks.