The usual internet keyboard cowboys.
I'll back Swanny up on this one, xyz mods list or even dyno charts does not equal xyz timeslips. These cars are hard to tune and drive consistently at the track, and unless you have nothing better to do than be at the track every weekend, you're not going to see a 10-second pass out of a 10-second car right away. I've had a low 11-second car for six years, yet due to one thing or another, I've barely got out of the 12's. And I'd rather make my car nice while doing it than slapping some big turbo on a $500 piece of shit just for the sake of getting a nice timeslip. It takes a lot of money and time, and having the two never comes at the same time.
For those that think they can all do better because they've read about someone else doing it, get out and do it yourself instead of telling someone what their car *should* do.