Did you ever see tomatoes sprout with 3 first leaves instead of 2? When you do you will grow a treat!

Excerpt from Homesteadingtoday.com, author Martin

tomatoes. With normal indeterminate(tall, sprawling) varieties, perhaps there will be a tricotyledon at the rate of 1 in 4,000. Or you may grow thousands of seedlings per year and never see one in your lifetime. However, determinate varieties, such as most of the paste types, have different genes. One, although not named, is an acceleration gene which causes the plant to grow rapidly and produce a large number of fruit at one time. I have proven that it can be manifested right from the start with the seed producing 50% more growth immediately by producing an extra cotyledon. Being true cotyledons rather than two normal and one double, from a twin embryo, the tricotyledons also then produce three true leaves instead of the normal two. Throughout the growing period, growth will continue to be 50% more than normal.