There's always going to be opposites for this one and with lots of views inbetween too.
I'm not sure about the strength of the track bike approach. "Thrashing" would certainly run a bike in more quickly, perhaps a track racer might want a well run-in engine more quickly. But obviously the lifetime of a track bike engine is likely to be a lot shorter than normal, so it's possible that they just don't get the time or miles in before they fail for other reasons and therefore the "unreasonable wear and tear" warranty argument is a bit secondary.
I tend to look at this from Suzuki's perspective (and by the way I
don't work for them...!!). It just isn't in their interest to give bad advice about running engines in. They don't want to spend their time arguing with customers and generating gossip about poor quality - the SV has a fantastic reputation for reliability and you can bet that Suzuki treat that fact like gold dust. They are expert manufacturers and it's fair to assume they know what they are talking about when they give advice. They have a superb product and they want it to stay that way.
Follow their advice, be patient for however long/short it takes and then have lots of fun. That's my personal view ...
