You're right. I got the number from Commerce, but Commerce's industry breakdown is weird. I don't know what the revenue split is between content producers like Viacom (who factor into the Entertainment & Media industry) and Comcast (who appear to factor into Communications Technology).
I think we can probably stipulate that information technology is a larger industry than entertainment and media; to the extent that it isn't, though, my point is stronger, right?
Where did you get that number? Americans spend that much on cable TV alone.