Disklavier

Hi, I am about to purchase a brand new Yamaha C2 with the disklavier 
feature. The piano arrived at the dealer and it is now set up in the 
showroom (for tuning etc). When I examined the piano closely I noticed 
that the light colored horizontal wood panelling below the strings is 
not perfectly flat and smooth to the touch, but the wood strips have 
raised ridges between them, almost like the "cupping" that occurs when 
hardwood floor strips become damaged from water.  Its as though the 
strips are too compressed against one another resulting in raised 
edges.  Other pianos (both Yamaha and other brands) that I looked at in 
the showroom did not have this problem.  The boards are flat and 
smooth.  The salesperson could not explain but agreed to look into it. 
Has anyone encountered this? Is this a defect in the piano? Could this 
be a moisture or humidity problem? Should I be concerned? Thanks!!