I rode again on Saturday and it was great! (I tried to post my timeline as soon as I got off, but the popups on this site are so awful on my phone that I couldn't even click on the text box before being redirected, so I had to wait to get back to a real computer.) Here's my timeline -
8:35 - got in line at entrance (I had been aiming for an 8:00 arrival, but I got off to a later start than I had intended and some rain during the drive from St. Pete slowed me down a bit, too.)
8:40 - gates open, start scanning guests in
8:47 - I scanned in and started at a quick walk towards the back. The extended queue was set up, but they didn't make us go down beside or into the Sinbad theater - we only had to use the section in front of the theater. One of the TMs stated that the wait time was 90 minutes (though I actually waited much less than that).
I didn't have pockets, so I had to put my phone in the locker and I don't know the exact times for the line after this, but they had us walk straight through the preshow room without running the show and the line didn't stop moving until I was in the cave hallway after the egg room. The Single Rider line wasn't open when I passed it, although I wouldn't have used it anyway because I wanted the bike.
They have rearranged the very last segment of the line since my last visit, as some other people have mentioned in here, so you have to be single file, eliminating the problem I had last time with the person from the Single Rider line ending up closer to the bike when we reached the car. This time, there was no question of who went where, and it went very smoothly.
I got the front seat again, which is just so cool! You can't see anyone else behind you and it feels like you're on your own private ride. The spur for the reversal definitely feels a bit more intense from the front, with nothing in front of you but sky, contrasting with when I rode closer to the back, where it felt more like just a gentle rocking motion before we started going backwards. For anyone concerned about heights or drops, this is the only part I think might be a bit of an issue - just try to get towards the back of the train where it's more mild.
9:40 - Already off the ride and back at the lockers. The listed wait was over 2 hours at this point, though I don't remember the exact number they said. As a side note, I really dislike the new lockers that scan your ticket. Like I said, my outfit didn't have pockets (I got dressed in a hurry and didn't think about it), so I had to stick my ticket in my shoe. I guess I need to get a lanyard, but I find them really uncomfortable.
The ride was as awesome as on my previous visits. I still won't call it my absolute favorite ride, because Flight of Passage holds that place in my heart, but Hagrid's is definitely in my top 3!
My gut impression from following this thread and from my own visits is that they seem to have the ride ready to go at park opening more consistently on Saturdays than on weekdays, but I haven't done any formal tracking to be able to back that up - it's just the general feeling I've gotten.