It is possible to push up to 80cph, at least in my experience. I can do it over an entire shift with casepack luck, but not consistently day to day as it depends on what the cases consist of.
Cut open, flip, dump out, push, no problem.
Cut open, dump out 8 small boxes, cut open small box, pick through plastic, styrofoam, tape, etc., push. No way.
We also happen to have 2 freaks of nature that can meet their 80cph goal times day in and day out, regardless. I'm truly in awe of them.
60cph should be easy imho on a daily basis for the average hooman. (other than H&H. Fuck H&H.)
Edit: This is also only for Inbound that don't have to do the guest thing. If I had to help guests, no way am I hitting 60cph consistently. (This applies to Q4 as well when stores stay open later and Inbound does the guest thing. I try to position seasonal hires between myself and guests so I can push more.
)