This is as much a milestone as me saying my dog pooped 3 times in an hour today.
-_-
I have to agree with his stance on this.
I've gotten 500 views since yesterday, that's 1/30 the time and still more views.
Think of a milestone as something that is difficult to get to for everybody. You might have trouble getting 300 views quickly (if you do, reevaluate your content production stratagem), but many others including myself and Phil do not.
Something more difficult would be something like 1000 subscribers. Anyone can get 100, but it takes a little something good to get 1000.
Or 10,000 views, 300 is E.A.S.Y. easy. 10,000, especially that on a single video or in a single day, takes a little something special.