Gmail was so much better than the competition — Hotmail and Rocketmail — that Microsoft thought it was an April Fool's joke and advertised that new Hotmail users would get something like a terabyte each.
It's disappointing that you deleted your post, because I hadn't heard of the http://en.wikipedia.org/wiki/CDC_1604 before. The way that I heard the PDP-1 was significant was that it was something like 100 times the speed of any machine within a factor of 10 in price. But I can't source that in any detail. Is it possible that that statement was true but only until the 1604 came out in the same year?
I will say that I thought Yahoo was almost strictly better at Gmail launch, except one thing... storage. And Yahoo was actually reducing the size if I recall correctly.
I do use gmail now, although I still find the UI, on the web at least, to not be to my liking.