Anderson did indeed workout with Allaire over the offseason but he's also been quoted as saying that they don't necessarily agree on everything. Anderson has his own very distinctive style that borrows from a lot of areas. It's all coming together now. Allaire is probably a big part of that but how big I can't say.
Allaire was a bad fit in TO with the young goalies that just didn't have the experience or ability to contradict or improve upon what Allaire was saying. Anyone who's watched Reimer this year knows he's doing much better without Allaire.
Having some informal workouts like Andy did and having the knowledge to integrate what Allaire was teaching with what he was already doing well likely resulted in a very good experience the fruits of which we see today.
I think there's a misconception about what happened in Toronto and about Francois Allaire in general. His focus has always been on developing goalies in the giguere style which is fine but doesn't fit every goaltender (particularly smaller ones). However his methods work for everyone when it comes to being square to the puck. Nowmatter what style of goaltender you are he is an effective teacher when it comes to this aspect. It's why Martin Brodeur (a standup goalie) still from time to time works with Allaire. You would be surprised about how many goalies use him for that reason. For example when I was at his hockey schools Corey Crawford, Josh Tordjman and Jonathan Bernier (I believe) were the big three goalies there who were noticeably head and shoulders above everyone else. There were two NHL goalies in the stands watching a lot of the drills (Roloson was one of them I believe...) to use for themselves.
In Toronto the issue was that there was too many cooks in the kitchen - One of the assistant coaches kept trying to change what Allaire was teaching and that's ultimately why he quit - he was tired of having upper management and the coaching staff trying to make changes. The truth of the matter is that all those Toronto goalies were thrilled with Allaire and completely defended him because they know that they would of each had trouble in the NHL without his tutelage.