The speaker at the Boston Tech Meetup presented an introduction to NoSQL and Couchbase, covering topics such as the diversity of attendees and the suitability of Java for a general discussion on NoSQL. The event was attended by a diverse group of developers, designers, DBAs, managers, and entrepreneurs, making it an ideal platform for discussing non-relational databases. The speaker addressed common concerns about NoSQL, including schema mapping problems, which were not invented by Couchbase but rather introduced as a variant of a problem already present in relational database systems.