I wonder if it is a fuel filter issue. I know, I know, it is a 100K filter. But what if it is pretty clogged? The fun thing is, you gotta get to the tank to get the pump out to get to it.
I have a pretty heavy foot, too. I love the fact that unlike my GMC, when I am heavy on the foot, nothing ******* breaks the **** off (like the driveshaft, seat brackets, alternator, rear end, and others in the first 50K). It has been my best car ever, and I have loved it since day 1.
If you are cool with the idle, then cool. I just wonder how the fresh gas could change things.