Due to fundamental physical limitations the fast and slow juggling records will converge where numbers juggling starts at 8 balls.
This source contains inadequate data. The records are for runs lasting 60 seconds, that's too long for 6 and 7 balls. Changing the duration of the record would increase the quality of your data. The duration of the record should be something like 10 times the number of balls, in catches. For example, the 5 ball speed records would be based on 50 catches.
by Stephen Meschke, in response to this post 2015-11-11 14:58:32