I just ordered a Wild Things Epic half-bag that was on sale through an on-line retailer.  It was advertised as the 6-oz. weight PL1 insulation (same as the WT belay jacket) but when it got here it was noticeably thinner insulation, and much lighter than the advertised weight (about 1lb. 6oz versus a listed weight of 1lb. 13oz).  I talked to the store on the phone, they said they noticed the same thing, seemed less than the belay, but more than the EP jacket, maybe like a 3-oz weight.  I thought I read someone else here making the same comment a while ago, anyone know if WT changed the half-bag insulation weight in the last few years? 
  
Thanks, it's bugging me.  And since they're telling me I can't return the sale item, I may be putting it up for sale here sometime soon if anyone is interested in a lighter weight half-bag.