Maybe there was something wrong with my 1.9.2, but when working with rails projects (rake, rails console etc), this feels a few orders of magnitude faster.
Thanks, I knew about that when it came out, but before I was able to install it, the preview of 1.9.3 came out - which is when I first noticed just how much faster it was.
After running a few tests on the commandline, rake and rails commands are even faster than they were in RC1.