Sky usually give a 'date +3 days' for a line to be enabled. Very often it is enabled before the given date. I would say in your case the main problem has been having AOHell on the line. They are one of the ISPs who are very reluctant to give up tags and have been known to place obstacles in the way of other ISPs. If you are going to be connected 4 days after a tag was removed that is pretty good, the physical work is done by BT who do not always give Sky the best of service.

If your router syncs with the same stats on the Sky connection you should expect 3+mbps. Make sure the internal wiring is OK by comparing the stats in the Test socket and your user position. An increase in the connection speed and/or noise margin means you have some work to do for the best results.