Worth the wait! Mine arrived on time Wednesday, though I did have to chase the FedEx guy down after he passed my house slowly, seemed lost, then sped off (happens a lot here). I just now got the old G5 tower cleaned up, removed auths from audio apps, and installed everything here.
No lockups, no graphics glitches, no reboot on wake after a 5-hour sleep, and with 3 hard drives installed it still makes less noise than my old G5 iMac, or the external FW drive I'm using for Time Machine now. Solid, fast, smooth machine all around. Very, very happy.