I also like reading in my feed reader, which is basically like a automatic offline "reader view" with automatic "read this article" marks. Because of that I quite early decided to never subscribe to a feed which doesn't give me the full article. So I don't ever have this problem. I basically feel that there is so much good content to read out there which I can get delivered to my rss reader directly that I don't really need to jump though the hoops and clicking on 'read more' links and adapting to badly designed websites with really small fonts and gray on white text colors.