My two cents on this:
1. It's hyper-partisan. There's no doubt this was produced only by Republicans, and its only purpose was to scare, not inform. (Not that there's anything wrong with that.)
2. I don't believe that the rates for IL and Chicago markets will rise so dramatically. IL has already implemented some of these EHBs, and our rates are already higher than most other states. From rumors we've heard, BCBS/UHC are going to have a 25-30% increase on fully insured group plans for next year, but not the monstrous 60% increase predicted here. The individual cost could rise that much due to maternity and rating provisions, however.
All in all, it's interesting, but difficult to take at face value.
Note that the chart on page 3 is specifically for the individual market, and the blue chart on page 4 is for Young Adults in both Individual and Small Group markets.
You are right about slanted reporting. The first time I saw this, I thought it was fake, using the symbols of congress yet being written by another organization. But it's not, it's actually from those congressional committees, particularly the minority staff of some of them. Their figures, however, may be true or at least close. In my home state of AZ, this says 65-100% rate increases, and that's what we've heard from carriers, too. I guess we will all know the numbers sometime this summer!