You heard about jimmermania everyday in Utah/LDS circles even took college basketball by storm... it was cool that a few superstars tweeted about it..However, for non-college hoops fans, people only pay attention to college hoops in March. Plus, there will always be a relatively "big name" in College hoops every year that is popular. This year it was Justin Andersen and Jahil Okafor.
Linsanity was an NBA movement. There isn't a "next Jeremy Lin" all the time in the NBA.