Here is a link to a discussion about this in the 2+2 Forums:
http://forumserver.twoplustwo.com/showflat.php?Cat=&Number=2634563&page=&view=&sb=5&o=&fpart=1&vc=1
Keep in mind that a big bet in this context is 2x the BB, as per Poker Tracker (i.e. 1 big bet = $4 in a $1/$2 NL game). I'm not sure where I stand in relation to other members here, but to give you some frame of reference, I'm at 6.71 BB/100 hands after 10K hands on Poker Stars, playing $1/$2 NL. Where do you play?