Just did it. No achievement, which might normally have been a bummer, but I'm playing on Origin. Don't care about those achievements.
I wonder if it was like a silly joke the devs thought would be oh so funny. I kinda just felt like they wasted my time to make the DLC longer it something.
I'm kinda surprised at the amount of people who said they expected an achievement doing this. Why didn't you just check beforehand? If anything I'm impressed that James even said anything afterwards.
I wasn't expecting an achievement, and personally I don't value them, but it should at the very least have netted a lousy 2 paragon points. It's one of the moments in the game where James is seriously impressed with Shepard, yet no reward whatsoever. You can get a lousy 2 paragon points just for having a brief conversation with someone, but spend several minutes laboring over prompt timed pull-ups, and you've only wasted your time. It's an oversight in an otherwise mostly solid DLC.