According to Adobe the Intel HD GPUs are supported:
http://helpx.adobe.com/photoshop/kb/photoshop-cs6-gpu-faq.html
The Intel HD3000 definitely didn't support the OpenCL portion, which is only used in a few things. In the barefeats tests, the 2012 Airs are back far enough to suggest that gpu acceleration isn't possible on the liquify or iris blur tests. These were taken a while ago when it came out. It's fully possible this has been updated. The mini is faster. I just used those as they were the only integrated graphics option that was represented.