I heard it was longer, perhaps Pink just blazed through the storyline without thought for anything else.
I am pretty certain it's longer (my playtime is about 20 hours), but it's kinda of hard to judge. Rather than a handful of long missions with side missions, it feels like a large number of short missions with side missions blended in with them.
As awesome and even dramatic as it was, no one told me they BUTCHERED the rpg elements in the game in favour for better shooting. I couldn't believe it...
Oh and ears, either play half-life or the original prince of persia IMO