The thing is the more people that use Perl 5.10.0, test or production, the more likelyhood 5.10.1 will be a really good release. Just like the amount of people that used 5.9.$latest influences how well baked it was.

So if you are contemplating switching to 5.10.x, then now would be the time to try 5.10.0 on your test suites and report any outstanding issues, while 5.10.1 should be coming fairly soon, 5.10.2 probably won't be out for a while.