I've heard of this too, this guy:
http://math.ucr.edu/home/baez/physic...hot_water.html
even has a name for it, "the Mpemba effect" and he
http://www.gi.alaska.edu/ScienceForum/ASF6/650.html
Someone in the physics department told me about this, claiming it would
make my ice trays freeze faster. I never did it because I feel hot
water has more dissolved impurities and only use filtered water for ice
trays.
Back to the OP, have you tried turning off the hot feed under the sink
and detaching the flex feed to the hot side. Then test to see if
there's sufficient pressure at that point. If so then it's in the
faucet if not, the line.
Richard

Doug Miller wrote:
In article . com, "Stretch" wrote:
Bob, I was a plumber/pipefitter in Pennsylvania for 8 years before
moving to South Carolina.
Often the hot water would freeze and not the cold. Makes no sense, but
it happened a lot.

Makes sense *only* if the hot water is in a smaller pipe. Otherwise, it's
simply not possible.

--
Regards,
Doug Miller (alphageek at milmac dot com)

It's time to throw all their damned tea in the harbor again.