Flocc is when the disk won't rotate. It will wiggle a bit but no actual spin. Usually it's only 30 seconds or so from "maybe?" to definite flocculation. So if you're unsure just wait a little longer to confirm.
However, with cream top milk, the cream rises quite quickly and so your cup will slow down after 8-10 minutes due to the cream and that can be confusing. But again, wait until the cup stops and it will be an obvious difference.