So, while aimlessly wandering around the wiki, today, I came across that ^^^^
I searched on here and the only mention of it I could find was by Justin (just after the CK had launched, early February) discussing it's similarity to RegisterForSingleUpdate.
And I was thinking ... by Default SetQuestDelay is set for 5 seconds (you can alter it by Quest, in pap-script, or Globally via your ini file) ... Is this having an effect on the issues we sometimes see some people experiencing?
Not really expecting an answer ... just putting it out there ... (mainly in case anyone else hasn't seen it and had no idea such a variable/setting existed)