Yeah, I was getting concerned when it wasn't moving at all, but it was only about 40 degrees, maybe under in the garage that morning so it had been cold-soaking overnight and I guess that slowed the warmup.
On another note, today I got some really good news: went to dealer where the previous owner took it for service (and where it was sold new and as CPO) and got all the service records they had on it. Found out that they replaced the mechatronic sleeve in March 2012. So, I lucked out and am REALLY glad I didn't spend the extra time trying to replace it in my garage! Whew!