LOL, bro, you'd think you are the only one who trains heavy and often around here.
. No, but I know what you mean. There is no way I could try to come up with some kind of statitistic about how grip works for guys who train heavy (i.e. those who are not "bodybuilders only" per se) but from what I have gathered, yes, I'd say you weren't typical in that regard.
I don't use straps for anything. I hold onto pullups with up to 100 pound plates strapped on. I do more pulling than anything else. In fact I probably do more rowing and at lower reps than most anybody here. And I pretty much live to deadlift so everything I do is centered on that. YET, with all that holding on to stuff it's still not enough for me to always be ahead of the curve on grip. I have to supplement it.
We both know nothing is definite and really, everything is an individual case, but I feel fairly confident from what I've observed from various vistas that my case is pretty typical (as far as needing specific grip work) and that I actually have a BETTER grip than average. When you see 165 pound dudes who can't do 5 pullups without straps....they aint gonna make it to 500 deadlift without supplemental grip training or without straps. So that's what I'm basing things on.
If Rob came on and said a bunch of specific things about his grip history, etc that differed from all that I'd happily backtrack.