Yes. But as I play the lowest stakes micro tables where calls happen more often than raises, over half of these are a single BB call. If nothing of any significant value turns up I bail. So half of these are seeing the flop cheap. If I were playing at levels where raises happened more often than calls this figure would be roughly halved.
At the moment, losses on single BB calls represent some 20% of total losses, so there's some tightening up to do here.
Would anyone like to throw a figure in as a target for losses on folds pre-turn/river?