WC Beta?Geeesh...the BS gets hot and heavy sometimes around here. I have a couple of this years WC GS skis ( don't ask how) mens( red) and womans (blue: 183, 24m+)). Neither has Beta, both are wood laminate, and, yes, both have the tiny race room icons embossed in the bases at the tail. In short they are the real deal and neither has beta construction. They also don't ski in any way similar to the 'race stock" versions. The woman's in particular has a much softer shovel, loves the fall line, hates being driven to the tip and likes be skied binding mount forward. They both also need to be skied fast...not recreational fast, but FIS level GS speeds.
That said, my understanding is that there are some mens WC skiers who still use Beta for the slightly beefier feeling it gives partic. for SL.
In truth, the WC skis are in a constant state of evolution , and making generalizations is risky as at any given moment only the top athletes and their factory techs know whats actually underfootat any given race/training/test