Many of the prognosticators over the twitters have been suggesting that Reimer will likely take a step back this season, and not duplicate the numbers he put up over 37 start season last year. That will also mean he will not be nearly good enough to send the Leafs to their first playoff appearance since 2004. For me, the most telling stat to suggest Reimer will not take a step back is his save percentage from junior in Red Deer (where he played on a rebuilding Rebels teams) to Reading/South Carolina Sting Rays in the ECHL (where he won the Kelly Cup MVP) and the Marlies, to the Leafs (where his save % never fell below .920). He has either always improved, or put up stellar numbers, save for a 3 game stint with the Marlies in his first full pro season (.882).
And to add to Reimers already impressive first year in the NHL, he went 4-0 at the World Hockey Championships posting a .926 sv% and a 2.04 gaa.
So yes, some goalie trends have suggested that a 2nd year player may take a step back (see Steve Mason, Carey Price). But I prefer to believe, since Reimer has never given us indications through his career to this point that he might fall back, it's fair to assume he's part of the group that do. So until he does, assume Reimer will do what he's done his whole career to this point, and that's improve.
I sourced my stats from hockeydb.com