Agreed. Interesting to see the trends though, considering ror 3 went golden a few weeks ago. (Btw, I use both aspnet mvc and ror depending on client requirements).
Now, people tend to just shorten it to "Rails", and indeed the top three hits for that are Ruby on Rails sites.
There's no meaning to be found in this chart.
Mind that ruby rails probably includes searches for "ruby on rails".
Sadly, clean trends for "rails" are not really meaningful - mass transit seems to be most popular of these all.