Currently we're pretty aggressive in blocking d2d. I have a laptop where d2d seems to work fine but is currently blocked.
Our intel blocking is based on crashes/bug reports.. could it be that you're just not hitting those same crashes?
It could be, but my device is currently blocked regardless of driver version and IE9 uses direct2d so it'd be nice if I could too.
I don't think we should spend any time loosening our Intel blacklist, as we have enough trouble with acceleration as it is.