New phenomenon? I think it was first VOIP apps I ever used with Windows 3.11 which already had some protocol level tricks to work around TCP limitations. Like using ICMP and or UDP traffic. Hardly news. I've been thinking this since reading about TCP for the very first time. I've even published a concept of "Bandwidth Hog", which is transfer protocol designed to optimize your transport. By stealing others bandwidth, aka not sharing it fairly. http://www.sami-lehtinen.net/blog/bandwidth-hog-quick-concep...