Interesting question. I've shot slick trick 100gr standards and vipers for years. I like them a lot. Haven't lost a deer yet. I've never noticed any sound issues, but then again I shoot a 15 year old bow with no string silencer. I do want to get a quieter set up.
Both the Standard STs and the Magnum STs had a slight whistle for me. No difference that I could tell between the two and this whistle happens with other vented blades I've used.