I'm a former semi-competitive magic player, and so I start by reasonable announcing:
"three, six, eight treasure, buy a province..."
and then because I want the winner to win by skill, not by forgetfulness I continue
"...5 provinces left"
I visibly count low piles too.
I try not to be obnoxious about it, and people don't seem to mind.
That's more or less the same thing I do, except I don't often Count piles. When I do, I announce the amount, though.
Huh, not sure I’ve ever seen Count pile. Could make sense with Obelisk I guess.