Only 10-15 over? Here in Connecticut it's common to have someone pass you on the right at 20-25 over the limit (putting them at an absolute speed of 85-90 MPH). Tailgating is constant. Xe can't wait to move back to NYC where the drivers are much, much saner. Seriously.
I hate when I happen to end up in left lane (construction merge from left etc) and I put my blinker on but people keep passing on right rather than let me get out of the way.