I used to think of Infusion as being relatively low capacity, and I guess it is compared with Nemesis due to the trains being half the size, but to their credit the staff seem to run it fairly well. I suspect the queue peaked at more like 45 min on Saturday as it was on the stairs for much of the day, but that's still short compared with several other coasters.
Often the park seem to get away with mediocre operations as guest numbers just aren't that high compared with Towers or Thorpe and they have more rides to spread people between, but there are now too many rides where capacity is problematically low: Avalanche, Nick Streak, Steeplechase, Valhalla, Ice Blast, Ghost Train, Alice and Grand Prix to name a few. Then there's the rides that could easily get much better throughput like PMBO (if it had a proper merge point for speedy pass) and Nash (if they'd dispatch trains as soon as the incoming one park)