I got mine in the mail today and I'm super loving it (playing it right now, actually) and yeah, I agree, it's weird how little it was promoted.
I mean it was a big deal, Level-5 did that poll about what game people would love to see the most, and then...yeah. It got announced for stateside release, then sometime during E3 they were like "Yup, it comes out at the end of August." and then...that was it...until now...the end of August...
It certainly did have a less than dramatic entrance, which is weird since both Professor Layton AND Phoenix Wright usually get somewhat more attention when they pop up.
I wish I could do more to spread awareness that this game actually came out. I can't help but feel like a lot of people don't know about it.