Originally Posted by Andrew H.
Actually, you have it backwards. Grammarians (i.e., linguists who study grammar) have been pointing out that split infinitives have existed in English since the 1300's. It's just a couple of random writers of usage guides who have promoted the no-split-infinitive rule, with no justification at all. And even usage guides for the past 100 years have found no problem with ending sentences with prepositions, but this idea still persists among some people who took as gospel some bit of misinformation that an English teacher may have told them years ago.
I do find it very interesting sociologically, though.
I apologise to the grammarians.