Hi paulv2k4,
I ran a test with 100 skeletal meshes in 4.4.3 and 4.5.1 with no fps loss (as shown in the images above.) I was waiting to hear back from Rama to see if he could offer more insight from tests he intended to run.
This is not a commonly reported issue. However, if you can provide more details about your project and how I could accurately test it here, I will look into it further.
Thanks