Hello
I wasn't sure about this either - I guess it can't count as sleep if they aren't sleeping, but for us, it doesn't seem to be a big enough difference to matter. I watch for fussing and glazed eyes - I think my LO is getting used to the routine and is starting to "tell me" when she's ready - if it's close to the end of A time, I go with it - the 5-10 minutes seem to come out in the wash IYKWIM - if she takes 10-20 minutes to settle but usually only takes 5 (and I know she's not OT) then I usually assume I may have hit it a bit early. The only time I cut A time (other than if she's giving me some signals that she's ready) is if a 2 hr nap turns into a 30-40 min nap and I can't/don't get her back down).