I did a recon hike up to mirror lake a few days before, so I had already planned out a route on my Garmin watch. I was on and off the trail as it had snowed like 6+ inches the days before. Anywhere I could take a more direct route I did.
With that said, there are constantly people hiking this trail, so you should not have an issue.
The hike took us just under 12 hours, but we started slow as the fiends with us were not feeling good at 10k feet and had to turn back. Our average speed was 1.1 mph due to the snow. I didn't lap my watch, so it is hard to say what the breakdown by segment was. I do believe we were up at Trail Crest by 11:00 am though.
If you are not bringing crampons and an ice axe right now you are being a bit reckless. Even if you do not need it, you should still have it.