I didn't notice the dates. Funny how some of these threads resurface. I'd be curious too how it has stood the test of time and how much it has been used over a period of time.
3.5 mph if accurate translates to about 1.04 / 100m . Not fast enough for me to sprint. If it could hit my 200 free speed maybe. That said its strong enough for 99% of triathletes.