"with people having apparently similar but in reality completely unrelated problems" Not sure what he was reading - this is a known problem with at least many early 2011 MBP - I had one (still do - it's in the closet). Apple is refusing to acknowledge this as a problem, and will offer to replace the motherboard (or something like that) for ... $300 and approximately 5 business days. From what I've read, whatever they…
Can I ask why a store (sixrig) has ads on their site?
But given he's a happy customer of their hands on service and didn't even mention the site, I'm not sure the answer you'll get will be terribly relevant.