changes to hadaka jime (rear naked) in the kodakan?

Recently we had a guest instructor of rather high rank "correct" how we apply hadaka jime from an arterial blood choke with an angular application to a wind pipe crush with a straight back application. The reasoning wasn't effectiveness but conforming to the kodakan standard. We've always done it the "traditional" way as an arterial choke, and so has every school I've visited. In fact this does bring light to a discussion I had with a 5th dan about the issues with the shallow entry some schools were doing. Has anyone else encountered this variation and is this change the kodakan standard now?