There certainly should be a specific speed. I.E
Use standard default iron set AND use standard defaut ball. THEN Time your swing meter with a full swing and a 5 iron (to be certain others use the same exact club)
Of course this assumes one has a minimum computer and internet connection.
DEFAULT 5 IRON and DEFAULT BALL. There should be a narrow window for any user
For no reason my meter speed up substantially about 2 weeks ago and as not returned to its old speed.
My driver meter speed is 3.5
My 3 wood meter speed is 3.5
my Irons meter speed is 3.5
These should be constant so if you time your meter and use any 3.5 meter speed club and a default ball it should be the same as mine.
Thx,
Ted