Redd,

I can't find the link so far, but I will keep looking. In any case though, it seems like having 30% equity vs. 20% equity makes a pretty big difference. Running my original calculation with a 30% equity figure gives me that calling down is +EV if the pot is 4 big bets immediately after the checkraise, which by definition it must be.

This seems to support d5's contention that it is usually worth calling down here.