I guess not a lot of this applies to me, here down under... probably different commercial relationships to some extent, not to mention that at my longitude (coincident peak times), we have pretty much only the Japanese to compete with for bandwidth. Only have trouble buffering YT occasionally, if ever. Though I seem to recall it being worse a year or two ago...
Anyway, the article prompted me to look into YT adblocking, and I found a great little ap that not only knocks out the pre-roll ads, but also the almost equally annoying pop-ups, for *great **victory*** : D
Disclaimer: it asks to install a mile of crapware, change your homepage and so on, and I even had to decline one thing by unchecking the EULA agreement and hitting the lone 'accept' button in the absence of a 'decline' one; pretty rude, and not a little ironic. Anyway, it does what it says on the tin, for me at least. Not sure if it's responsible for the few-second delay I'm getting at the start, but if so it's a small price to pay IMO.