The one thing where the blogger is, IMO, dead wrong is this:
This is wholly correct over here in Europe, but in the US they always wore (and still do wear) the same, single-stripe trousers for both black and white tie. I actually have a Thirties midnight blue tailcoat with matching trousers - single stripe. This is a US / Europe difference. Personally, I prefer the European pattern, but I can very much see the utilitarian appeal of the US approach. Myself, I quite like to wear white tie trousers with black tie. Oh, I know, I'm incorrigible...The tailcoat trousers lack a double galon stripe, even though this remains the absolute standard for men’s evening wear to the modern day.