take manufacturer's claims
divide by 10
half it
half it again
you now have the max your device will ever reach, with the usual speeds being ~60% of that
(my isp says 300mbps, divide by 10, half, half, 7,5mbps, which i think i never saw since the speeds are actually from 3 to 4)


i hate mtp until i see the 6 hours remaining on a wireless transfer and then i love mtp