How much difference does it really make? A relatively low sync speed will mean that HSS may be needed just a little more often than otherwise and using HSS entails some compromises. But is it really a big deal?
See my note in post #70. Basically saying I can get much sharper images with my 135L using a faster shutter speed. I can move quicker when using a higher SS.
The compromises can be huge when shooting during a wedding. Battery life falls dramatically when using HSS. Overheat warnings turn on MUCH sooner(I'm in the desert so it could already be out in hot temps), HSS requires the flash to be MUCH closer to the subject while at close to full power meaning recycle times slows. So getting landscape couple shots or lighting a large family can be prohibited if the lightstand/modifier is in the shot. Or if I got the couple interacting with each other and they're giggling or acting intimate and I fire off 3-4 shots, at full power in HSS, it's likely I may only get that first image lit when using HSS.
I will ALWAYS try to keep from using HSS if I can and using ND filters can lower AF accuracy depending on the amount of stops. IF it's midday I do what I can, HSS is a tool I can use, but I would definitely prefer not using it.



