I think you are right BURG - a lot of shaded 6.5's so far - not sure if there is a lot of value playing anything under 7 or 7.5 for that matter - too much room for error in the bullpen. The article says the totals are "generally 7.5 - 9" and while it doesn't say it is an official rule perhaps it is a good guideline to go by.
I layed off the Hudson/Lincecum Under this weekend cause I just didn't see much value there - so if both pitchers give up a run or two and throw 7 strong - your putting a lot of faith in the bullpens not to give up a couple more. Played TB/TOR U8 which matched up the #22 and #23 pitchers in the ratings and it covered without a sweat as Shields threw a gem and Romero pitched well too - felt there was a lot more value in that play as you leave a little more room for error in the bullpen....especially this time of year....
I agree also Odieo. Under 6.5 is hard to fade, and it seems like it has been getting beat up pretty bad this year. One of the things we'll find out by tracking this system is what areas to tweek so we can improve our record. We might need to look for the 6.5's and bet OVER!