Stamkos pre-injury was known as a speedster and his skating was his strongest attribute, but post-Titanium rod Stamkos at the age of 34 being #2 in NHL?
This mainly makes me question the validity of these measurements.
MacKinnon being at the top for most frequent speed bursts does make perfect sense, though. It's his trademark. And in general, the lists for those two attributes look more sensible than the ones for max speed. Hintz being near the top, and probably the best pound-for-pound skater for his size, also matches the eye test.
I wonder what the error margin is on these. The top speed ones likely are wacky, but the burst ones probably cancel out via sample size.