Probably not so much a lie as too much faith placed in the accuracy of the speedometer. IIRC, law requires the speedo to be somewhere between 100% and 110% relative to actual speed (i.e. 10% optimistic). 172 / 110% = ~156.
I know a trackday coach who will be turning 61 this year. He rides a 2004 Kawasaki ZX-6R. Same guy owned a Harley K model back in the day and has ridden all over the country, albeit on a different bike I think, probably a 1990 Honda CBR1000F.
The stock SV650 throttle tube (the part you twist with your hand that has a pulley on it) is meant to be very newbie friendly, such that you need to turn it a lot to get to full throttle. It's much nicer with an aftermarket throttle tube that lets you go from off to full throttle without needing to re-grip.
Consider the SV650 makes about 10% more power than the Ninja 650, putting the SV at about 66HP on the first graph and on par or slightly ahead of the FZ6R up top.
And again this is ignoring how much lighter the SV650 is compared to the Bandit/Katana and FZ6R.
SV650 (aka SV650N, for naked) is less so, but it has no windscreen.
FWIW, I commuted on an SV1000S for a couple years and it wasn't bad, but then I was only on the bike for ~25 minutes at a time. That said, I have heard the SVS's seating position compared to a Ducati superbike.
At one point I had plain aftermarket no-rise clipons on my SV650S race bike. I found I had trouble with my body position, not being able to get my upper body off the bike as much as I wanted. I eventually got aftermarket clipons with a 1.5" rise, the same as stock. It felt a lot better. I'm only 170cm (5'7"), though.
What about an SV650/SV650S? All 2003+ models are fuel injected and can be had for fairly cheap, at least here in the US. Power-wise, they're on par with a Bandit 600 and weigh a whole lot less. Fazer 600 has a fair bit more power but is still fairly heavy compared to the SV650.
I don't run street tires on the track, so the comparison is moot. That said, I have heard reports of trackday riders experiencing good tread life with Pirelli's Diablo Rosso Corsa, Pirelli's stickiest street tire, even at advanced-level pace. I think at least 20 trackdays on one set was common (100+ miles per day).
Motorbikes ridden on the street, especially when used for commuting, are very prone to a phenomenon known as "flat spotting". This refers to a change in the tire's curved profile such that the center is worn much more than the edges, producing a visible ridge on either side of the center of the tread. This affects handling negatively in that the bike may be hard to steer near 0 lean angle (i.e. high bar effort), then suddenly very easy after a certain point.
On the track, you're using both edges of the tire much more than you would on the street, producing more even wear on the tire. Clockwise tracks wear the right side more than the left, but visiting an anticlockwise track will address that asymmetrical wear.