Steve - yep, thats what he says.....got them the wrong way round!
I really enjoyed reading that book - another thing he goes on about, which makes a lot of sense, is to stop trying to chase PBs all the time...you will only get disappointed, and that really you should only compare the same course time, rather than race....as some races are so different you cant compare a flat fast half in early spring, with a hilly half in the middle of summer!