Well, not really. I played it on my cousin's Xbox, and we basically played it together. He's a very straightforward guy, I guess, and doesn't exactly stop to smell the flowers along the way. We followed the main story (and some side quests, but probably not all) together and when it was all over the save file said some number between 13-15 hours. I don't remember the exact amount. But it was kind of perfect for my cousin (then he could get back to FIFA) while I felt it a bit on the short side.
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I see.
Well, the thing with many of JE's sidequests, is that upon completion they tend to yield futher side quests. So I guess failing to partake in quite a few may be what's responsible for your relative lack of play-time.