You're not wrong, but in an election at the national level, 9 points is normally considered a pretty big spread (for example, Obama's victory over McCain in 2008 was pretty solid, and that was by a 7 point margin).

It is a good sized spread. I do think there is more interesting things going on there if you really start pulling the data apart. Although there is no technical definition of super majority that applies to all cases I like the 66% number which would imply you are twice as likely to meet someone from group A as opposed to group B if everything was random. Others of course can have their own definition of what a super majority is.

Note that none of those that Pew's counts as "college educated" in its surveys is in any way verified to be a college graduate of any degree or discipline.