It's difficult to dispute much of that, however..
There's at least two extremely basic errors with what he's saying.
First, that lying is "not necessarily manipulative, but rather reflects a desire to be liked and to fit in". That may be particularly kind phrasing, but it is very definitely manipulation. The fact the intention is not a malicious one does not stop it being manipulation, even if the person has convinced themselves otherwise.
More seriously, the assertion that the lies people tell depends on the type of people they are. Without seeing proper analysis I suggest the lies people tell depends on what they have done rather than who they are. There might be a correlation between extroverts and number of partners, but that does not equate to 'extroverts lie about their number of partners because they are extroverts'.
Certainly, if the 'non smoker, rare drinker' I had a date with once had been upfront that the first thing they'd do on the date was light up a fag and expect a G&T I'd never have met them.. (I don't like dating smokers, for obvious reasons).
It's not really a surprise that people will present themselves in the best possible light, and when that continues to fail, will start lying to increase their chances of success.