This is going way off topic, but since it was spurred with talk about me..... I don't think I ever said I am averaging 14-16 mph, I say I ride 14-16 mph. My average is about 13 mph, but that doesn't concern me at all. I'm not trying to get somewhere, I'm not trying to go a certain distance in a certain amount of time, I am trying to ride approximately an hour for fitness. The fact that I ride 14 mph for 5.5 miles (the roughly 22-23 minute time that I ride 5.5 miles confirms to me I am riding 14 mph), then when I hit the 63° air and I lollygag in the tunnel at maybe 5 mph coasting for the most part to give the rear end a rest from sitting on the saddle, and then stopping on the other side for a drink obviously screws up the average. If I'm riding from here to there or I state I want to ride X miles, then I would be concerned with average and maybe I would state average when talking about it. I'm concerned with my riding speed though and such I ride 14 mph to where I turn around and ride 16 mph on the way back with maybe a 10 minute time period that I am cruising through the tunnel.

So sure, average speed is very deceptive, especially if your means of measuring it takes into account stopping or moving. My computer stops if I stop. I have tried MyTracks on the phone which gives me a moving and an overall average and Runtastic which only gives overall average. None of them gives me what I'm concerned with and that is riding at a good rate for 90% of my actual riding since none can differentiate my riding down the path or wheeling the bike around in the parking lot and cruising through the tunnel.