Stats... like Crash Davis, I'm not a big fan of turf, and I think that the health concerns about it are starting to get a little traction. However, I don't get your point: if half your games are home doesn't having an all-weather field help you get in 50% of your games as scheduled?
In our league one of the 8 schools, a private school, has turf, and that field is ready to go after any amount of rain, so it has helped them enormously getting their games in. (or at least it did before The Drought) Often away games will be played there too -- if the opponent's field is too wet, they'll agree to switch venues to get the game in and swap fields again later on, if possible.