I think the word "initial" is doing a lot of heavy lifting there. There is a world of difference between "out there on the grass doing some light ball work" and "training like everyone else and available for selection".
If we see him again at ANY point this season I'll be delighted, but even if he's ahead of schedule I'd be surprised to see him in competitive action before April.
The one thing I'll say in his favour, is that Ty is an incredible professional, and having gone through this before, I suspect he has done absolutely everything within his power to reduce the time to get back fit. So if anyone was going to do it ahead of schedule, it would be him.