Now I do feel like an idiot.
I was going to be helpful, and supply some statistics. And I can do that. These numbers are from bjmath.com for 6D, H17, DOA, DAS.
EV for T,T vs. 6
Stand: 0.67659
Split: 0.430478
EV for 9,9 vs. 7
Stand: 0.399576
Split: 0.363783
Now here's the really dumb part: I don't know how to interpret this. For T,T vs. 6, my understanding is that if I stand, I'll win 68 cents per dollar bet. But what about splitting? Can I expect to win 43 cents per dollar bet? Since I'm betting two dollars now, that would be 86 cents, so why not do it? Yet I know this isn't right. So, 43 cents per what?
Anybody feel like explaining this simple concept to this beginner here?