I also will join to the "6-month" mob. This seems to be the period it takes for recovery after the surgery.
I didn't recover or PT after the tear and before the surgery. My surgeon made me stay immobilized with a brace for about 10 days so that the swallowing could go down a bit and then did the ACL repair. Then the PT was hard and (very) painful. Don't know if the other way it would have been easier. From what I heard from my therapist it wouldn't.
One more controversial statement from the therapist: "Skinny people recover faster and easier than those with developed thigh muscles." Can't verify that either as I've always been far from skinny
P.S.
There must be a 3 year old (I think) thread in this forum from me when I had my injury and surgery.