That's because your ZZR1100 =/= litrebike
Your whole premise is wrong. When people say "don't go from a 250 to a 1000, just get a 600" they don't mean a sport-tourer or cruiser or some other heavy bike. They're specifically talking about sport bikes.
To give you some perspective using stats from http://www.motorcyclespecs.co.za/
ZZR250 - 40hp/146kg dry = p/w 0.27
Your ZZR1100 - 147hp/233kg dry = p/w 0.63
My CBR600RR - 118hp/156kg dry = p/w 0.75
2008 Gixxer - 185hp/172kg dry = p/w 1.07
So yeah a litrebike is another class and not something noobs should be riding the second they get their 6F. I always intended to trade up but never got around to it. 600 is plenty fast on the road and track.
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