"Since I bought it based on comments here, I hope it will be worth the wait"
Yikes! While John Kim and I both liked it - and John and I often times don't hear things the same way - Scott, our moderator, didn't care for it nearly as much. Personally, I would put it my top 5 of M8 recordings.
Also, keep in mind that along with the MTT/S.F. Symphony Mahler 8 that's coming out in late August, there will eventually be a David Zinman M8 on RCA. Both of those set of performances had a very solid cast of vocal soloists.
Barry