I think you misunderstood my and others' posts elsewhere.
It will show as active almost immediately. That database is fine.
It is the estimated speeds databases that can take a few days to update, but even that rarely causes a problem. I'm not aware of Sky worrying about it if low, but O2 and Be don't like low estimated speeds and neither does FTTC but you aren't going for any of those.
No ISP is going to worry about high speed estimates, but there is a chance that the speed you get may not match the initial estimate. Seeing as even valid estimates are usually very conservative anyway that is unlikely.
It all comes down to us trying to give you too much information! As a builder we had in recently said to me in a text when I sent him my latest query - Stop worrying
Everything will be fine