You just touched on a big difference with pool pumps. They are part of the equipotential bonding grid. Aslo the code is chipping away at the pumps that are not required to be GFCI. All 1p cord and plug pumps get GFCI now. I would not be surprised if all of them were GFCI in 2008.
(I also read this to be like a koi pond, which is under 680 V IMHO.)
