I would say I really didn't notice changes until about 7 months, mostly because the changes are so gradual you rarely ever notice them. Truth be told, I wouldn't have noticed them then if a friend hadn't pointed out some changes from the picture on my driver's license. But yeah, less pronounced brow, fuller cheeks, slightly thinner nose, softer skin are the most prominent changes.
And Alaina, lovely video. I especially loved the music selection.