not wanting to defend ib from detractors but eurex seems to be quite overwhelmed as well. sometimes it takes several seconds for a order being added to their order book. also, there are option products that have lost a valid bid/ask quote for more than an hour. i think they are not cut out for this shit.
also, futures on dax jump more than 10 points every once in a while... and that's with a direct eurex datafeed, so not ib.
the freezes though seem to be ib related. maybe their servers are not be able to handle the stress.