I've never had any problem with Meagan talking during and after programs. I don't even notice her talking during programs. I don't mind any skater fist-pumping either. To me it just shows their excitement and engagement with their program and what they are accomplishing.
I think the problem isn't the talking, but how noticeable it is. If the skaters are performing a piece well, you aren't likely to notice if they are talking.
As to the earlier comments comparing FS to dance...Dancers do plenty of jibber-jabbering during performances. Some of it depends on the person and the performance, but it does happen. Especially if something goes wrong during the performance as they need to communicate in order to deal with the issue. (I worked as a stage hand for a number of years, so I've seen it.)