Late to the party ... but this is really one of the things that makes the little things in life a little easier.
Found Ians site about a year ago and spend some time after that convincing people that they have been tying their shoes wrong their whole lifes.
Was met with much skepticism, but ultimately most of them tried and never looked back. There is still one guy who "praises" me for showing him how to tie his shoes because before he had to retie his shoes several times a day.
I followed Ians suggestions and use the "fastest knot" on a daily basis. For hiking and sometimes also for running I use the secure knot, mostly because the fast one actually can become undone on very slippy laces.
TL;DR: Knots are great, rethink your habits from time to time