I’ve flown a dozen times in the past 3 months and haven’t noticed longer than usual lines anywhere. They do make you put all electronics larger than phones into their own bins now, but that hasn’t seemed to make the lines longer at the front end. It’s causing a bit of a backup in the scanner but they’re still moving people through the people scanners just as quickly, so you wait slightly longer to get your stuff off the belt but it hasn’t been that much longer… maybe 5 minutes at most.
FWIW, I’ve also noticed that the last couple of times I flew through MCO (both in the last 18 months) the lines were actually a little shorter overall than they had been in the past. I waited less than 20 minutes either time. TSA precheck has had a crazy paradoxical effect at many airports, where that line is now longer than the regular line half the time and I rarely ever even use it anymore. That said, if they’re saying it’s in effect through the new year then my guess would be that it’s more to do with increased airport traffic due to holidays than anything the TSA has implemented.