I'm one of those posters, and I still think that. I'm not saying that there will never be players who transfer twice (after all, there were guys who transferred to sit out a year before), but I think it's a better bet that a player who are transferring to Iowa State won't transfer again than that a high school player won't transfer away from Iowa State.
But that's also contingent on the NCAA not giving out very many or any waivers for a second transfer. It's possible that second-time transfers right now still think that they can get a waiver easily, when that might not be the case.