Obviously, I can't verify the accuracy of the mags, but they have no reason to undestate the number (in fact, they like to overstate since it makes the bikes look better to their advertisers) and they all say they have secret stretches of deserted roads they go to where the bike can easily reach it's terminal speed. They're good at things like this - they do it all the time.
Once a bike gets near its terminal speed, acceleration tapers very radically to nothing as power and drag come into balance, so you don't need ten mile stretches to get the terminal speed of a bike. Even Bonneville has something like a 2-mile acceleration zone where bikes reach terminal speed and this is for much faster bikes than 150 mph. I lot of folks like to talk that their bike is "pulling like a freight train" at the top speed they got and assume there is a lot left, but there seldom is.
- Mark
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