No, the effect is that the Iowa winner usually does not perform well in NH. Re: Huckabee and Santorum, and many others in past elections.
Yeah, winning Iowa almost has a negative effect on New Hampshire voters. They view the Iowa winner as part of the crazy religious right and instinctively want to pick someone else.
Cruz has had his 15 minutes. If he can stay in til TX he might have a shot at that one but that’s about it.