It's not literacy, it's more like knowing car's engine error codes. Arcane knowledge which is very useful if you're mechanic but would be mostly useless trivia for anybody else. Guessing "example.com/2014/04/18/the-great-quux" is a date-based URL is a nice parlor trick but most sites don't even have this URL scheme or any URL scheme at all. Next to none of the phishing-relevant sites does. No print ad would have URL of any complexity - if it would have anything beyond domain name it'd be a single keyword.