They still are, but there's a paper still in press regarding the discover of amateurons. They are the same size, but they aren't as good at staying in the nucleus.
They’ve been difficult to find… most physicists have only been looking in the obvious places. You have to look in small towns, little theaters, and obscure play companies to find them. Physicists use their grants to go to Broadway and only find the Pros… and often miss the outstanding offerings one might find by looking for the obscure amateurons in out-of-the-way locales. Also, they suppress those who do find such rising lights, because they’d have to re-write their own textbooks and they’re too lazy to do that. Besides, they’d have to admit they were wrong when they wrote them. Can’t have that, you know.