I don\'t hear anything \'abnormal\' in these. Sound pretty, sweet and nice to me. Unrealistic velocities? Depends on your style. Practice makes poifect...
Almost anything is better than an old Yammie - limited midi velocity from the factory.
To smooth it out, if you wish, record to a sequencer, use the velocity smoothing/compression routines to smooth it out. (Reduce velocity to 33%, then add 60, or some such, depending on what the seq will do.)