In county cricket, 81 per cent of balls are bowled at slower than 82 mph

In county cricket, 81 per cent of balls are bowled at slower than 82 mph, and almost no deliveries are above 88 mph. Compare that to Test cricket, where over 60 per cent of the balls bowled are over 82 mph and 17 per cent are over 88 mph. We also move from bouncers making up 4 per cent of balls bowled in county cricket, to nearly three times that many in Test cricket (11 per cent).

N. Leamon & B. Jones, Hitting Against the Spin: How Cricket Really Works (2021), loc.827