Outright ignorance is definitely pushing it. It's a guess, but very much an educated guess that it's mostly Brexiters who are googling it. Bremainers tend to be better informed, so they are less likely to be doing last minute (or in this case post-last minute) googling about the issue.

What a load of bollocks. The majority of people on both sides have been getting the bulk of their information from mainstream media, which is heavily biased towards a limited set of narratives. There's a fair amount of compelling information that has been omitted from or suppressed in the public debates.