Clem and his team of testers work tirelessly to test all the distro updates. Unless you can get into that group you aren't testing anything until the RC comes out.
That way the only stuff that gets out to us is hopefully a relatively solid product. If it doesn't cut it on there end it gets scrapped or held back
they are currently sitting at around 95% successfull testing on the latest main editions both 64 and 32bit so it's not long til a RC is released.
End of the month at the latest most likely, maybe earlier fingers crossed