I definitely feel like the QC is slipping. Golden's QC, at least. The Japanese/Chinese/Taiwan models have been consistently great for me. I live near a HUGE knife store, so I get to handle multiples of pretty much every model Spyderco makes. I am sad to say that I have noticed the same trend. The Golden models just aren't as well made as the foreign ones.
I really, really hate to say that, but I promised myself I'd never be blinded by fanboyism. I actually made a thread on this very subject a long time ago, and I had many people agreeing with me. It doesn't seem like much has changed since then though.
I've noticed two trends in the past few months: Benchmade's QC is improving greatly, and Spyderco's QC is slipping. (again, the Golden models) I sincerely hope it changes. I really do. Spyderco is definitely my top production knife brand overall, so I'd really hate to quit buying the USA made models because it turned into a crap shoot.