It's not really forgettable if any app can request a scan at any time – collect wireless logs, then start the Maps app, you will see repeated scans. Locationd doing this ever so often might be acceptable, but not when any app can do this, repeatedly.
Also, 25 milliseconds is about a round trip across half the continental US. Not really sure that's a good tradeoff for devices that are mostly stationary.
A 750-1000 ms increase would be disturbing, but a 20 ms round trip increase for a brief two seconds is entirely forgettable. It's nothing. It (and more) happens all the time between you and practically any destination out on the Internet as part of normal traffic/congestion patterns.
Also, 25 milliseconds is about a round trip across half the continental US. Not really sure that's a good tradeoff for devices that are mostly stationary.