How is 150/2 even possible? Shouldn't the ratio of packets to acks be 37.5 to 1 (1500/40)? This would suggest a minimum upstream of 4Mbps.
It's not. People aren't really getting 150/2. What they're experiencing is the increased speedboost for ultimate users. If they download a much larger file, they'll notice that their sustained download speeds will be at the 75 mark.
Perhaps it would be even higher if they raised the up channel.
IMHO what would be a great benefit is upstream speedboost. The speeds shown on your upstream speedtests are not constant throughout the upload. My Express starts out in the 1600kbps range and doesn't increase to 1900 kbps till 3/4 of the way into a 20MB upload. I track my upload speeds down to 3 decimal points eg 1645.673kbps. Rogers has yet to deliver 2000kbps on any consistent basis.........most uploads top out at 1990.
Can't complain....it's a free upgrade (for now)
It's 1000 times better than before the upgrade from .512 but it's still not what they're advertising...............