Sure, NON LFO vibrato is more realistic IF and it is a big IF the sound engineer does not screw it up by having a LARGE variance in vibrato depth and/or speed NOTE to NOTE.
Unfortunately many of the sounds using sampled vibrato suffer from this. My T2 and now my PA2 have many sounds that are ruined by this.

It is not that noticable if you play fast music only...but if you play beautiful ballads, musical theatre etc it will ruin the performance. Anyone else just hate this problem?

The samples have to be done right. And at the cost of the TOTL arrangers they should be...but, sadly are not.

Small variance note to note is very nice and realistic.

So, LFO vibrato eliminates this issue, even though you loose some of the natural nuances.

Lee S.