The revised rule currently reads:
52: Count of Opponent’s Chip Stack
Players are entitled to a reasonable estimation of opponents’ chip stacks (Rule 24). Players may only request a more precise count if facing an all- in bet. The all-in player is not required to count; if he opts not to, the dealer or floor will count it. Accepted action applies (See Rule 46).
I don't think is correct. Players can certainly request a more precise count of any wager that is being made on any given round, not only all-in. I think Dave Lamb also confirmed this at the summit.