It doesn't try to work out the sync speed.
Simply it asks you to do a speedtest and/or enter the info if you know it. Most users this early, and reading this forum, are knowledgeable enough to find out and understand their speed.
Getting IP Profiles and sync rates is more cumbersome or nearly impossible so it would complicate matters too much and simplicity is what I was going for.
My point was that while FTTC often results in big speed increases, it seems that a minority are reaching the top speeds at this stage. If you have a speedtest over 35Mbit, it's a safe bet you're on a high sync speed too. Obviously you could be synced at the full 40mbit (or 38.7 or whatever is max) and still get a slower speedtest but the point still stands. If you had a gigabit connection and still only got 25Mbit what's the point of calling it a gigabit connection?
As I've mentioned it's all subjective and interpretation rather than 100% accurate. I find it interesting that thus far less than half are reporting they get towards the top end. Given the
charts we've all seen showing VDSL2 supposedly capable of handing out 40Mbit up to about 1KM do we infer that ISPs on the whole aren't up to it or that most people live quite a bit further from their cabinets than they think due to roundabout cable routes?
Consider a
news post on this site that suggests that
only 12% of lines are further than this 1KM distance from the cabinet. I'd have hoped the data coming back to me would be closer to this if it was true. So are speedtests duff, equipment not good enough, ISPs slower most of the time or people running other stuff in the background when testing?
Hopefully as more people take a minute to complete the survey we can all get more data to work with. Subjective of course, but not totally invalid.