Trump was predicted by polls to win Iowa .
http://www.wired.com/2016/01/what-debate-bing-predicts-trump-will-win-iowa-anyway/
As it turned out, it was pretty much a three-way tie with regard to the all-important delegates (and Cruz never fails to point out that it's the delegates, and not votes, that matters) between Cruz, Trump and Rubio. Basically they all had 7 delegates with Cruz getting 8.
So when Trump won the 99 delegates in Florida, it was basically the equivalent of about 11 or 12 Iowas for Cruz.
On Tuesday night, the 95 delegates in NY will represent about 12 times the amount of delegates that Cruz won in Iowa. If Trumps wins them as expected, his FL and NY delegate haul will be approx. 24 times as much as what Cruz won in FL.
So it's a bit curious that the Cruz folks still like to hang their hats on Iowa.