Pool tested last night at my friend's house who owns the gore-tex version.
Results: I walked in 4.5' of cold pool water. stayed 100% dry (only a brief submersion and walk around the pool). i felt the cold on my bare legs and where the water pooled (there is a flap to marry the bib to a dry top) it felt wet, but wasn't at all.
my friend told me i need wicking socks and some type of under-long-pants to stay warm if in the water.. I knew this but that point was driven home last night in the 55* pool water