I was told that my hair would grow back to its pre-transplant state in 6 weeks. I'm a few days short of that now, and it's not even close. From my own personal experience and from the hundreds of pictures I've looked at, 3 months is a realistic time frame for looking normal again due to temporary shock loss. Some people claim they can go back to work sooner than that, but as someone who works in a very cluttered office, I wouldn't dream of it. I just couldn't handle all the awkward questions, which I would inevitably get because its obvious that something drastic happened to my hair.
ON THE OTHER HAND.... everything I wrote above is rendered false if you're willing to use the brown magic that is Toppik. Take a look at my pictures (link below) and you will see that I look completely normal at 1 month with Toppik, maybe even better than I did before surgery. And I probably could have started using it at 3 weeks with a similar result (but I only decided to get it at the 1 month mark).
Ever since I started using Toppik, I've been able to go out and be social, hang out with friends, ect. Every friend I've asked said it looks completely natural and they would never know I'm using concealer. I feel completely comfortable going outside without a hat now, and I would be comfortable going to work with the Toppik on.