At the risk of being labeled a Cally-lover, there is really no evidence to back this up. There could be and probably is a ton of different reasons for all the decommits. You claim that ol' Billy sold them a bill of goods, but it easily could be that when Bo met with these guys, they didn't have faith in him as HC. I'm sure sCUm, UT, etc are using our horrible season and worst D in the country as leverage against coming to DONU.
Now, ultimately it is BC's fault, as these guys expected to come play for him in an improving program. But his fault is not getting it done on the field, not what he did or didn't say in the living room. And even if we lose out on a ton of guys this year, I think we can all agree that the program is in better hands.