Rode my 700x33c Tracer Pros today at about 35 psi (for reference I clock in at 220#/100 kgs).  I took my Crux out to the local MTB trails. I THINK they grabbed better and handled better in dirt and gravel. I rode up a fire road climb 2X and did not feel much slippage and they seemed super-stable.  Tomorrow I am going to drop the pressure to just under 30 psi to see how they ride.  Now if I can crack the code of riding the single-track stuff laden with roots (up and down).

Timmy, your LBS guy doesn't understand the different properties latex brings to the table then.  It does take a bit more care and handling during install but, nothing crazy.  Latex is typically what is used inside tubulars (every high end race tire has them except the Clements, which are vulcanized and don't use a tube, we are talking $100+ tires).  They use them for a reason.  They stretch and conform significantly better than butyl.  So a pressure that might cause a butyl tube to pinch (because it isn't able to stretch enough to avoid the rim impact cutting a hole in it) should not pinch a latex tube.  I've been able to run latex tubes in clinchers to the point where the tire is squirming on me and folding over, without pinching.  YMMV, but they are a relatively inexpensive option.