Via Sherdog:

[Athletic Commission Counsel Nick] Lembo said Palhares’ past adherence to such a mindset is part of what led to his decision. He reviewed Palhares’ submissions of Helio Dipp and Flavio Luiz Moura in Brazil in 2007 before Saturday’s fight and thought those holds were held too long as well. "If you watch those two fights, that concerned me,” Lembo said. “He’s very, very slow after the referee physically intervenes, as in this case. I think Palhares in an outstanding fighter with an outstanding future. Maybe this will send a message that his camp can discuss this with him and maybe alter it a little bit."

You can read the whole thing here.  I know this was a contentious decision, and I think this is a pretty elucidating explanation of the thought process from the AC.  Personally I think it's a positive step that past behavior was taken into account, but this is a contentious issue in general and I wonder what you all think; was the AC right to give a penalty based in part on past transgressions?