What makes you say that? USPCC still uses linoid, linen, cambric, smooth, and some others all distinctly labeled on the boxes.
Two reasons, one a technicality and the other legal.
First, the legal. According to a blog post by Jason Brumbalow about a year ago USPCC was going to start labeling all of it's brand name cards "Air Cushion" do to some trademark issues. I think it may have been all tied up with the legal battles they were having with the BicyB cards over the Rider Back but I'm not really sure? There was no mention when it would take effect and he was unclear if it was every USPCC card or just the various Bicycle brands. It was going to effect the Ellusionist cards. Supposedly they would have to start labeling their signature brands Air Cushion regardless of the actual stock and finish. T11 may be exempt. I have word that they are actually a "partner" with USPCC at this point. Indeed their cards are starting to make their way into most retail stores and not just sold exclusively online. This special relationship may exempt T11, T11 may not yet be effected by this decision, or Jason Brumbalow may have been mis-informed. Anyways, I have yet to see any Tallys or Bees with "Air Cushion" but I have yet to try out the Erdlinger runs of those cards and I certainly don't have a 2010 print run of any of those either.
Now the technical. I searched high and low for an answer to "What is a Cambric Finish?" question. I even asked USPCC direct(no answer) and the most accepted answer from card collecting experts is that the "Cambric" is a printing term used to describe the pattern of dimples on the surface of the card. If you look close you will realize that the dimples are not aligned in perfectly even rows and columns but, in fact, resemble an almost checker board type pattern. This pattern "looks like" a cambric fabric that is most commonly used for cross stitch and other embriodery work.
Now because practically all USPCC cards with a dimpled finish use the same pattern for the dimples then technically all USPCC cards(save the smooth finish) are "Cambric Finished." That doesn't mean that all the finishes are exactly alike. Indeed, I am pretty sure that the Bulldog Squeezers, the Propogandas, and the Tally Hos all use the same stock and they all have the same dimples but I can definitely feel a difference between them....not a big difference mind you. So all in all the fact that some cards are labeled as Cambric and some are not comes down to advertising. And that advertising dates back over 130 years. You will find that most cards are labeled "cambric finish" are associated with the Bee brand. That dates back prior to Consilidated Dougherty, when Bee was owned by New Yourk Consolodated. I believe they actually came up with the original pattern but I'm not sure. What I know is that A. Dougherty advertised the "Liniod" finish, Russel Morgan had the "Air Cushion" and NY consolidated had the Cambric. How big a difference each of those finishes were from one and other 100 years ago I cant say? What I do know is that all three of the major USPCC brands are using the same dimple pattern in this day and age. So the labels about finish are more company history than anything else. The biggest difference these days in cards (IMO) is in the cut, the press, the stock, and the quality controls used. Some say the final spray coat finish makes a difference, and if Richard Turner told me he could feel the difference in the finish alone I would believe him, but for me, and I suspect most of us, the biggest difference you will find is in one of the afore mentioned areas.(Actually, unless you do a lot of Faro work the cut probably doesn't make a big difference either) So it all comes down to this. Don't take too much stock into the finish label on the deck.
If you are interested in more info...
http://forums.theory11.com/showthread.php?30984-Playing-Card-Buyers-Guide
