Interesting, I know I have a tendency to slow down when I solo, so I do try and push myself then. If I'm told at other points that I'm pushing the tempo, I tend to think my natural tendency is to slow down, but maybe it's possible I could push the groove, I think it's more that I demonstratively carry the groove, and they slow down when they solo.
But I work with leader that I have to respect his tempos, I don't mind changing to his whims, but just don't yell at me when you make a change.
There's nights he's lucky he has chops, that I haven't busted him in the mouth.