Probably a bit of both.
We've been spoiled in the US with Friedel and Keller and Howard. All top level keepers. We're not just hoping for someone along those lines, but practically expecting it.
Arsenal haven't had a top GK in a good bit now. They've had solid guys, but not a top 10 or 15 in the world guy. They've had some great distributers, but have lacked that amazing shot stopper. I'm assuming that watching some of Turner's amazing saves gives them a bit of hope. I hope they're more right than we are, because I'd love to see him become that stud for the US.