No! He assures us he's a realist about his fitness. And he truly believes he can run 2:29 in Boston.
Seriously though, I think he's right to think positive thoughts at this point. It's good to think positive thoughts and have genuine confidence that you can execute the race plan... as long as the race plan is realistic. The problem is he's not thinking positive thoughts; he's thinking delusional thoughts.
If I were him I'd target 2:35 pace and plan to have a fast finish. The last 5mi are ~200' net downhill. Many people's quads are destroyed from earlier downhills and they spike their lactate/HR on Heartbreak Hill, so they can't take advantage of the fast finish (also the race starts at 10am so it can be pretty warm for the last 10k, though it won't be warm this year). That's his fate if he is on pace for 2:29 through 21mi.
Alternatively, he can experience true authenticity by admitting that he overtrained in March and has misunderstood how his workouts relate to race performances ever since he's gotten into sub 2:35 shape. Admit that he was about to make the same mistake again by believing in a 2:29. And then say that the new goal is to get through 21mi on 2:35 pace and try to run the last 5.2mi at 2:29 pace to finish in a high 2:33. That'd be a win that he can carry forward to a fast fall marathon.
The most hilarious reality would be that he reads this thread and the actual thing holding him back is his pride preventing him from taking our advice. The fact is that LRC, despite all its trolling and cynicism, is home to the highest concentration of people who actually love running and will genuinely celebrate and respect anyone's good performance (as long as they're not doping). Embrace us, Eric. Negative split a 2:33 in Boston and then humble yourself before NSM to run a sub 2:30 this Fall.