Well, I can't claim that my attempts to gather and synthesize information are particularly scientific, but they have produced some numbers and trends that I'd be happy to share.
Of the 184 early 2011 MBP owners who have responded to the survey, 112 have the 6750M and 56 have the 6490M. Nearly all of these respondents report graphics issues, regardless of which GPU they have.
Of the 220 people whose information I've logged from threads about this issue, only 104 provided enough information about their affected early 2011 models to know which GPU they have. Of these 104 users, only 11 have the 6490M, and the remainder have the 6750M. (This sample size should be a lot larger once I've made it through more posts on the largest thread about this issue.)
I'm not incredibly surprised by these numbers, as only one of the standard early 2011 models offered the 6490M, and the remainder used the 6750M. By comparison, only one of the standard late 2011 models offered the 6750M, and the remainder used the 6770M. And, in case you're wondering, the mid-2011 iMacs whose faulty GPUs are being replaced through the latest video card replacement program use a 6970M. I've seen a number of complaints from other mid-2011 iMac owners whose models were not covered under the replacement program even though they have graphics issues as well, and - guess what? - the rest of the mid-2011 line used a 6750M or 6770M. The more I look, the bigger this gets. In 2012, the iMacs and MacBook Pro models switched to using NVIDIA graphics processors, which had been heavily used in MBPs before 2011 (most famously, in the 2007 and 2008 models that ended up covered under a GPU replacement program).
There are certainly affected late 2011 users posting in the threads about these issues, though so far their numbers seem to be a bit smaller than the affected early 2011 users - but not insignificant. If the early 2011 models have so many with the 6750M that are affected, then it would seem logical that the late 2011 models with the same GPU could have the same problems. I'm actually more curious about whether there's a problem with the 6770M, because we know the 6490M, 6750M, and 6970M have issues. All of these are part of the AMD Radeon HD 6000M Series, and share many specs and features among them.
When I started the survey over the summer, I had no idea how big this would turn out to be. If I were doing it all over again, I'd structure the survey quite differently to accommodate owners of any of the affected 2011 MacBook Pros or iMacs. If someone else is interested in creating a broader survey, I'd be glad to provide the form I created as a basis to manipulate - I'd work on this, but my hands are a bit full with the thread logging and the governent shutdown. 😝
