Do you honestly think Trump would not have used that information to gain a competitive advantage if the opportunity had presented itself?
Trump has the exact same information on the media that Cruz did. The difference in what did with it is obvious.
Cruz gave Trump ammunition he is already using - real dumb move.
Donald Trump Blasts “Dishonest” Ted Cruz at New Hampshire Rally (2-2-16)
https://www.youtube.com/watch?v=7GSzw2XdpJo
Carson isn’t too happy either;
http://www.foxbusiness.com/features/2016/02/02/ben-carson-cruzs-apology-needs-accountability.html