Having lost patience is a function of applying heuristics to the never-ending, time-consuming task of evaluating information. I'd say open-mindedness refers more to an outlook, a goal or an attitude. They're not mutually exclusive. I get that the language is imprecise.
A person who simply dismissed every incoming datum which fell into the "This Clinton scandal will totally blow your mind!" category would have been right very close to 100% of the time, which is a pretty good heuristic. If need be, that same person can simply wait for the evidence to mount and then alter their opinion.
I have pity for anyone who really feels obligated to separate the wheat from the chaff (in the interest of open-mindedness!) when it comes to every outraged Clinton news item.
The main issue is whether or not you believe that's business as usual. And it might be, I'm not discounting that.