LOL Muzz, you're taking this too far. Garrett says it themselves, CAN cause damage when in CONTINUOUS or LONG PERIODS of time in the surge region. Surging under no load quickly between gears is neither of those things. Generalized FAQ answers is not SOLID PROOF of anything. Consider the forces involved between continuous operating in the surge region versus a little bit of chatter from your charge pipes filled with some boost. Got negligible?

Also please get off your high horse about everyone's knowledge. You've done one fluid mechanics course and you think you know it all? Please... Leave your comments on education at the door and concentrate on the discussion not those discussing it.