It somewhat matches my experience too. Generally I'd say there's 3 classes of blocking: total block (twitter, fb), rate limiting (google), and general QoS downg

It somewhat matches my experience too. Generally I'd say there's 3 classes of blocking: total block (twitter, fb), rate limiting (google), and general QoS downgrade (which seems so random that it might just be the infrastructure being so bad). I really doubt any of that happens ad-hoc based on your usage profile. And yes I did notice that certain routes might not work on non China Telecom networks, but that again is probably just bad infrastructure. I always assume The Great Firewall is 80% market protectionism and 20% censorship (or rather irrational fear on the side of the govt). Wouldn't worry from a user's perspective.