Underqualified, from the series of awkward encounters in the working world

So I started my new job on Monday. Now, I had realized beforehand that this new environment would encourage many many awkward moments, but I didn't expect them to begin so soon. I got to the office at 9:00. I apparently wasn't supposed to get there until 9:30, so that was special. (good thing they didn't see me pacing around the office building for the 15 minutes prior to my "arrival") We kicked it off at 9:30 with a company meeting, in which we introduced ourselves because there were so many new faces. (ie, me) Introductions where similar to the following:
Person 1: My name is Betty Sue and I got my PhD from Harvard in Physics. I've been working at Global for 3 years, and I am currently working on 6 projects involving companies all over the world.
Person 2: My name is Harold Augustus. I have a PhD from MIT in molecular biology. In my thesis work I created a robotically controlled hand using magnetic field properties. I have been working here at Global since the beginning of time, and I wrote the software you all use.
Person 3: My name is Super Smart Dude, and I used to be a practicing physician before getting my PhD and then coming to Global, where I have been for 5 years. I am travelling around the world next week to present 4 projects simultaneously while securing new clients and fighting crime.
Marla: Hi. My name is Marla Stump. I just got my Bachelors of Science degree from the University of Pennsylvania in bioengineering. This is my first day.

...although I chose to spell out my educational accomplishments in as many words as possible, it did not mend the silence that followed. My boss looked like he was going to say something a few times, then sort of waited to see if I was going to say anything else - at least try to make a smooth transition or a joke. I opted for silence. Ah, first impressions.