While I understand that you’ve calculated out the expected shutter speeds to freeze film motion, I’m thinking that in the practical application there’s more factors that help to freeze motion that aren’t accounted for. Peter seemed pretty intent that the durations you’re specifying aren’t necessary and I’d think other existing systems would have a very hard time attaining those specs as well.
Here’s a site that has helpful info on traditional photography flash units:
http://paulcbuff.com/sfe.php
Not saying you’re wrong but just thinking there’s something we may be missing.