Are ugly fonts more memorable?

Fascinating interview on BBC Radio 4's Today programme with Jonah Lehrer who has written in this month's Wired magazine on how ugly fonts, rather than making it more difficult for us to absorb and remember information taken from books, can actually improve long-term learning and retention. Does this mean in future that we can expect a rash of language textbooks and primers in more unusual fonts such as Monotype Corsiva, Comic Sans Italicized and Haettenshweiler?