You might want to check your spelling in your first post, as you've just admitted to "touching an old squire", which has started me giggling uncontrollably.
Just to echo what everyone else has said, they are all very narrow at the nut (which is why I can't get on with Jazz basses any more) but the shape (or profile) of the neck varies from model to model. You'd probably really need to play the specific model you're after to make sure you're comfortable with it.
Having said that, I think the neck on the Geddy bass is lovely, even though I don't like Jazz necks.