Yeah, I personally agree that Sony's done much better with Second Son than most of its other exclusives. I also don't expect it to compete with Microsoft's advertising of Titanfall; Microsoft has a much bigger budget for advertising, and Titanfall is also absolutely crucial for the system (this is a fact that the Forbes article also identifies).
The biggest difference is definitely how the press has responded to Infamous as compared to Titanfall. One reason (as the Forbes author also points out) comes down to Sucker Punch not wanting to show off too much of the game in order to preserve surprises. I'm personally pleased with Sucker Punch's decision, but I do think it's muted the press' excitement thus far. Buzz from press is a major component of building hype before launch. Of course, all of that will be forgotten/forgiven if the game reviews really well. I do agree though that there's far less buzz heading into this compared to Titanfall. As would be expected.