i suppose it would be noticeable, but we're very used to it. we only really use evoo.
: in the last couple of years, i think i've only bought one jar of commercial mayo. does your dh like the taste of olive oil? maybe he would like an olive oil only mayo. it's so much healthier than the canola/soybean oil in the regular mayo's.
He probably wouldn't like it with any type of beneficial oil! If I make something, he'll usually ask if it's "healthy". Oh well. He grew up eating cookies for breakfast so it's a challege for him to get used to whole foods.