Do you think Rich people get faster marriage based AOS?

[Houston2016]

Not even close, its actually the opposite the two major things that drive AOS timelines are "severe financial loss" and the "amount of applications in your area". Higher income cities have much longer waits due to population density. USCIS also rejects many expedites or pushes them back if the situation is not dire. The Senator/Congressman will push harder for cases they know they can use an advantage, again severe financial loss.

Good example for it is Houston!

our PD: 14 Nov 2016
approved: 07 Aug 2018

I am following a group on FB as well, i haven't heard, somebody got a fast track!