corn from transplants

This year on Denman both May and June were quite cool. Cool damp soil is terrible for corn germination.So, we have the day length for corn to grow, but germination outdoors is terrible. How do we fix this?
We've all been told again and again that corn doesn't transplant well. However,I found out that a friend of mine always starts her corn plants indoors and then transplants them after danger of frost is past, and at about the 4 leaf stage. Hers were planted out in mid may and are doing well. I did a few transplants, and had success with all. In fact some were planted into the garden by a novice gardener, and they did fine. The corn seeds that were planted in ground in early June, on the same day the transplants were put in, had horrid germination [maybe 15%}.
This wasn't a scientific experiment, and I have yet to see how the transplants produce, but I'll probably transplant em all next year.
Other crops which are forgiving of transplanting even though many books say NO, are the cucurbitae [cukes, squash etc.], and beets. I start the cukes, squash and melons indoors for the same reason as the corn. The beets I transplant as I thin them. Beet[and Swiss chard] "seeds" are conglomerates. Each piece contains more than one seed, which is why beets always need thinned.
The warnings in books are to keep you from blaming the author for any problems. Yes corn and the others transplant less readily than tomatoes, but with minimal care it is still doable.