Not me, personally, but my mother had hers done in her early 60's and was back hiking in under two months.
Dug, unless they were very gentle, easy hikes, I think that you are mistaken. Your mother almost surely a meniscectomy, where they remove the torn part. The recovery from a meniscus repair is significantly longer than two months.
ChrisB, if you're talking about an actual meniscus repair, which is more and more common, and not a meniscectomy, then yes, I had a meniscus repair a couple of years ago. It's a pretty serious recovery, as you really have to baby the repair for the first couple of months, and then it will take a considerable amount of time and effort to rebuild your muscle mass, especially in your quads. I actually had less mobility in the weeks after my meniscus repair than I did after my earlier ACL reconstruction, however, overall the meniscus repair was, for me, a much easier recovery. While YMMV based on your orthopedist, I essentially wasn't able to drive for at least 6 weeks, maybe longer, because of the brace. (I was able to do short, local drives around town, with no passengers, but it required left-foot braking and using the accelerator pedal-arm above instead of the pedal itself, because you can't bend your knee when weight-bearing. While I was good at this and got used to it, it's definitely not something to be done on highways.)
You should expect it to take at least 6-9 months, maybe as long as a year, to get back to full strength. You lose a lot of muscle mass and that takes time to rebuild. The biggest thing is to be patient, be diligent with your PT, and remember that while the recovery is long, you will get better. I hiked the Doubleheads almost three months to the day, Randolph & Crescent three-and-a-half months post-surgery, and did a Adk. 46er work day—light stuff only—six months out, but these may have been earlier than what my orthopedist would have recommended.