No.. SP1 for 2008 R2 was released 16 days before the release of 7.1, and IE9 was released after 7.1. I would expect to see support for both in 7.1 SP1 due this summer.
This is pretty common with any vendor, any product line. Especially given that the release of these things was either after the 7.1 release or mere days before. You can't test it on a Service Pack you don't have, and by 16 days prior to release, you're pretty well locked into the development cycle.
Like I said, I'm guessing we'll see support for both in 7.1 in SP1 due this summer.