Re: Interesting...
@Mark 85: corporations don't usually bow to public pressure, but they do bow to regulatory roadblocks, which can (and sometimes do) respond to the public.
In this case, added to the public pressure are all the municipalities which regulate cable companies AND the production companies, none of whom liked the idea of a monolithic cable company with 60% of the market deciding which channels were carried, what rates were charged, and what bundles existed (phone, cable and ISP...)
The muttering was that the FCC wasn't/isn't going to let this one slide through. If the FCC imposes too many restrictions, the deal wouldn't make sense, so they would have to lobby to get Congress to overrule the FCC, which costs a lot. So better to drop the deal now than to pay lots of money and still maybe not get the deal they want/need for this to make sense.
Of course, the other part of it is that Comcast and TWC are currently spending LOADS of money to try to persuade Congress to reverse the FCC on the Net Neutrality rules, and perhaps they just figured that weren't going to win both, so better to focus on the one they really care about.