That is great, you may get different ones on different plants so if you save seeds to try another year pick the ones you liked best and keep those, then next year see what you get again. I would be interested on how sweet and aslo if they are starchy, plus.. you need to keep a cob back and cook it three or four days later and then test again, I would even keep one a week.
You need to see how the time affects the eating quality.
XX Jeannine