I sympathise, but I doubt that you'll get much response from HP on this.
i had a slightly more obscure pre-sales question (see http://h30499.www3.hp.com/t5/Printers-LaserJet/What-PCL-XL-Class-Revision-level-does-LJ-M451dw-support/m-p/5809657 ) a year or so ago, regarding the PCL6 Class/Revision level supported by a particular printer model.
I did eventually get an answer of sorts, on one of the forum's "Expert Days", but it shouldn't have to be a "getting blood out of a stone" experience for potential customers.