I'll be pleased with every win, but unless he gets a dreadful draw, I see no reason to presume he can't get a few wins. They'll all be gunning for him, but we shouldn't make the mistake of under-playing Mayer's role in his victory. He was playing really well.
In the past week, loads of top 10 players have lost sets, or whole matches, to players ranked a lot lower than Mayer. It was a good reality check for us all, and clearly Andy's circumstances are different to others, but the fact Andy was able to play some good tennis, for at least some of the time is very promising for the longer term. We just have to hope that he gets a kind draw and faces players who are just the right level of challenging to allow him to shake off the rust and improve his fitness. Even with a kind draw, he's going to reach a limit, but I doubt even he knows what that is yet.
I agree Sparkle - I'm not expecting a very early loss for Andy as I think the slam format will help him to play into form. There are some players he's going to want to avoid in R1-3 though - such as Verdasco and Cilic who I think will both be unseeded this year. But if he gets a good draw, then the five set format will help him to get match tight. R4/QF seems like a reasonable target to aim for right now.
The fact that Andy came within 3 games of beating Mayer is encouraging. His tennis was there, he just needed a bit more focus towards the end of the second set to finish the match off.