I've also had a mild protest about citations in the lead, and made the same response. What I don't know is what would happen if I or another editor went around putting {{citation needed}} against lists of common names with no sources given. I'm not quite sure if I want to try...
No, what I call "climbing French beans" aren't  uncommon; in fact I have some waiting to be planted out right now. But I hadn't heard of them being called "pole beans", which of course doesn't mean that some people in the UK don't call them that. The two problems with the cultivars I've grown is that (a) to grow well they need higher night temperatures than runner beans, showing chlorotic symptoms if too cold (b) they suffer in strong winds as their leaves seem to shred and snap off easily compared to runner beans – I guess that growing them together with the appropriate maize cultivar would give them wind protection. Anyway, enough beans for now!!