I think impatience set is broken.
I first came to the idea when I had above 1000 speed on my knux which seemed excessive.
Today I looked closer when I call a wave early before the counter appears I get 1,5%speed
When I called with 5 seconds on the clock I m think I got 3%multiple times and 2,7 once( if I Remebered correctly)
When I called the next wave with 2 sec countdown I got 2,1%
So maybe I get an extra 1,5% when there is a count down. But I may be a bit off with my values.