Your talking to a newbie, so I haven't gone faster than 80kms per hour yet, and as for how quickly it moves from 0 to 60 - I think it's pretty quick - but again I'm new at this...
Each time DH takes it out of the garage for me, he steals it to go around the block a couple of times, he thinks its' a great little bike!
My husband took it out with Honda on their demo ride with a bunch of other guys who all had "big" bikes. They all came back and said it was a hoot to drive... they had tons of fun. They said full out they got a little over 100km per hour, but then again they were not on the highway.
I haven't really filled it up yet, but they say approx 400kms per tank, which is 10 litres - much more economical than my Toyota 4Runner. Seems right so far - I have a gas gage
Here's an interesting article about a journalist who took the 125 out for a test ride. Well worth the read.
http://www.cmgonline.com/bikes/articles ... index.html
Kaiser - don't know where you are from, but Honda is going across Canada offering free demo rides of the CBR 125. It's free, great place to try it out without committing yourself to buying one.