Maybe we're using the word "hype" differently. I'm not thinking just about number of commercials. I'm using "hype" to refer to a combination of press attention, push by the company (through ads, mentions in interviews, tweets, or whatnot), and/or gamer excitement/anticipation. In those terms, I think TF got a ton more hype than KZ.
Sure, KZ got the up-front position during Sony's launch, because it was the "looker" of the group. And it got praise for its graphics and scope. But Killzone was a known quantity -- the fourth or fifth iteration in a series most PS owners had already played many times (the ones who were interested, anyway). Not a whole lot to hype there -- no big unknowns or new features or, honestly, reasons to get excited beyond spiffy new graphics.
Titanfall, though, that was a totally different story. It was an unknown quantity, a new game -- and from a highly respected studio, a studio that had created the dominant franchise of the last generation. Not only that, but it was a do-or-die game for that studio, and a hugely important game for Microsoft, who had spent tons of money to acquire it (that's the money I was referring to, btw) and who were counting on it to be a system seller. It has attracted an enormous amount of attention.
Or, if you don't believe that, look at the amount and length of the Titanfall threads vs. the Killzone threads here. Yeah, we have more Xbox fans than PS fans. But a search on Killzone turns up 7 or 8 threads, most of them about resolution, with one main thread of 38 pages. A search on Titanfall returns 48 threads (an underestimate, since I know we've merged a lot of them), and the official thread (stickied, btw, something that doesn't happen for other games) is now on its third version and well over 150 pages long. lol. I mean, come on.