Stephen Trapani wrote:

I strongly suggest the original poster test his theory by trying to
float for an hour or so in his wet suit, *without fins* which is
something he's probably never done before.

Upon completion of this task put on a PFD and note the difference. I
contend this will end all thoughts of substituting his PFD with a wetsuit.

I don't think you've given any thought to the different thicknesses of
wetsuits. If you're thinking about the fashion-skins worn by
blasphemyjet-skiers/blasphemy then you're right -little to no
bouyancy- but anything actually made for diving will keep you at the
surface comfortably for _long_ periods of time.