what is the better site for testing internet speed. i have 500 up-dn and i now use ookla for the tests and that seems good but i tried the speed check and that was way slow for fiber internet and then i tried fast.com and that seemed a bit over when my phone app for frontier tells me. also why doe the speed start out slow and creep up? if that really normal or is it when i go to a website the speed is slow for a bit and then ramps up?