PC Games Hardware had a chat with AMD at the Games Convention in Leipzig about microstuttering on multi-GPU systems. AMD seems to think it's not really a problem but they also said that there isn't really an easy solution for microstuttering anyway.
The micro stuttering issue reached AMD, but it seems like there are different opinions about the problem. Sasa Marinkovic, Senior Product Marketing Manager of AMD's Graphics Group, doesn't think microstuttering to a problem. In his opinion he "Micro Stall” are not a not a real problem for the customers.
Rene Froeleke, Technical PR of AMD, already made some test in that area. But he is skeptic about to what extent microstuttering can be realized without benchmark recordings (with Fraps for example). Possibly Fraps isn't working accurate and a simple solution would actually not be close at hand anyway.