[ QUOTE ]
Now if the your vying for a 10 BB rather than a 20 BB win, how many bets are you willing to invest to get it? On the river it's at least two, and it might go to three or four. So your odds to see showdown on the river are somewhere between 2.5:1 and 5:1.

[/ QUOTE ]

This is a very good point, and why I think it is close, since we are probably losing to a flush around that often.