Well, it turned me into somewhat of a bike fan as i bought it on day one when it came out and although the overal content is quite limited it provided me the same enjoyment any GT game gave me before.
I'm a car guy mostly and only slightly interested in bikes before, not that i've turned bike-mad since but it goes to show it can provide fun even when you're not really into bikes.
So yes, if you asked me, it is still largely a GT experience albeit from a completely new angle and different cornering angles.

👍