I can imagine Foster's Home has the same kind of humor, since it's also created by Lauren Faust.
The reason why MLP:FiM has become the internet phenomenon that it has is because of
this article. Pictures from the show surfaced on
4chan's /co/ board, initially to attack the article, but curiosity caused some members to watch the episodes.
Quote from the Youtube user Bandpuffs as it's a fairly accurate description of the show itself:
Quote:
It's not really an obsession as much as it is an internet/animation phenomenon. It's a good cartoon with smooth animation, great writing, classic cartoon goodness, a super catchy soundtrack, and fantastic voice actors. It's also a bunch of fun. We watch it because it's a cartoon and cartoons are fun.
I can imagine if Foster's Home, Spongebob, or any other cartoon had an effect like MLP:FiM did, you'd have seen memes and macros from those shows as well.