No idea about Award Advocate, but we've been using Jasper2009 for several years now (and many trips) since we found him here on FT.
He tends to respond very promptly, and especially if there is something pending with some time urgency.
I don't remember how long it took for a reply from the first inquiry, but I have no recollection of starting to "wonder", etc.
We recently returned from a NZ-Australia cruise. Getting there and back was really tricky. I've heard that's one of the most difficult for Business or First. And... this was an almost last minute decision, especially compared with the usual 1 year.
But he found some wonderful flights for us, and on airlines we preferred, and especially, not on airlines we did *not* prefer. That was wonderful on relatively short notice.
He's also a regular travel agent. So now we also have him book our cruises and most of our hotels. (He can get perks that are very similar to Amex Plat, but not identical. He's part of a different luxury network, etc.)
Enjoy your travels!
GC