Perhaps high latency? The typical website contains a bazillion small objects so although your bulk transfer rate might be high if the delay to get the start of each request is also high you will spend a lot of time waiting. Also check your DNS performance.
My speed is 66mbps, however web pages can be horrficly slow to load, on all devices. This can't be right? 66mpbs should be reasonably fast.
Anyone got any suggestions?
Running a 4g router with simcard.