Game unplayable since patch

[bigbuns]

I played three games of RT after it came out. Ran fine, many bugs for a release, but it didn't lag at all.

I come back after the patch from the other day and now it runs like rubbish. the lag is unbelievable. My computer hasn't gotten worse since then so I have to assume that somehow the patch has stuffed it up.

Anyone else had this problem?