[R-D]

I disagree with the announcement. If you're willing to put the time into installing it and don't have tons of free memory to spare on MySQL, you will still see the reward on smaller sites.

I doubt it'll be all that significant server side, but it will take a nice chunk out of search times, especially for common words. It might also mean you can hold off of upgrading your server for a while, as the usual search related reasons to (locking, slow searches, etc.) will never occur.