Originally Posted by
Down3Green
This is known as "Anticipated Separation" and it's completely normal. In fact airport's like ATL, ORD, and JFK couldn't operate if Tower controllers didn't use this procedure
Yep, seen this quite a bit at ATL. As long as weather conditions aren't conducive for above-average wake [turbulence] persistence, this is perfectly normal.
Funny enough, I've actually seen this more when it's a wet runway than not, but I'm sure that's an observation bias.