I have not opened an IB acct either, for the reasons you mentioned....and there does seem to be a few conflicting reports as I have read tweets from some individuals saying that IB would'nt let them buy a certain security. Not to mention.....opening an account there seems alot more difficult than most other brokers. I asked myself "is there a 4 year course you have to take to figure this out"? LOL I'm old though.
I have also heard that IB does'nt have the greatest customer service once you open an account there. So....i'll wait and see. If I keep hearing that more and more people are buying expert market, i'll probably have to consider opening an IB account.