We were at Chef's last week (Wednesday, March 10) and Remy was still there! We had never been to Chef's before, and tried it because our youngest is such a Remy fan. It was lunch on our arrival day, and it was great!
When we checked in with our ADR, I asked the hostess if Remy was appearing today (we planned a 12:30 reservation, but I know he breaks down sometimes) and she said she would need to check. She asked the manager, who came out smiling, exclaiming "But of course, Remy is here today!" He was very enthusiastic and friendly. When we were seated, Remy came over to our table immediately - he was great and his handler was so sweet with the kids. Our server was also great - again, very nice and very friendly with the kids - and we really enjoyed the food. We also had a great table right next to the window - could not have been better!
So Remy was great, and even if he isn't around permanently, we'll definitely return to Chef's!
P.S. The shop at the back of the France pavilion sells Remy plush - complete with Chef's hat and plush spoon for $11.95 - it was the first purchase of the trip!