I went to check their source, a npr science piece titled "New Research Finds Lonely People Have Superior Social Skills". It seems reasonable to support the claim, except the "research" was "Choking under social pressure: Social monitoring among the lonely". These people were lonely due to poor performance of social skills rather than the lack thereof, but I'd say that's socially awkward in either case.
So: information distortion in only 2 hops, and lonely people do research seriously