Now that three months have passed since the release of RubyGems 0.9.0, are folks upgrading to this new whizzy version? Well, as part of fixing this bug I've imported the past few months of RubyGem download data into the RubyForge database, and so now we've got some numbers. Yay!
Here are the downloads by client id since, more or less, the end of June:
So 0.9.x leads the way! This is great to see; the more folks that are using RubyGems 0.9.0, the easier the load on rubyforge.org will be thanks to Jim Weirich's optimizations to the gem indexing gizmo. Good times!