I dont know what the benefit to waiting is. I've read of folks who pitch at high krausen and others who wait till the starter finishes up then decant and pitch. I began the whole process of creating a starter last Saturday. I suppose if you were working with something store bought you wouldn't need as long as I took. Hell I could have probably done a better job of getting my starter built up. I had to step up from a bottle harvest so I waited, decanted, and fed it more low gravity wort. Then decanted again since it was almost 2L and pitched that late last night.
Who knows if I'll have any problems. I've got airlock activity so I must have done something right.
Now the hard part: waiting.
@Brewphish - Got my Dead Ringer IPA (2 Hearted Ale Clone) into the fermentor last night! When's yours slated to be wrapped up?