Not exactly 1-3mbps variation on the top end speed is very little and could be down to the test server being used and the traffic on t'internet at any given time, I can now happily say my upload is 15-18mbps consistently and my download is still at around 68-72mbps
I'm happy, considering I was only expected to get around 59mbps, or at least thats what I was quoted. To be honest I'd have been happy with anything 40+ so for this I'm extremely happy.
Far too many posts on forums are down to bad things, as we only complain when things are bad. Occasionally I like to drop a compliment in, so here it is!