Well, as you know, I don’t credit any of the current polling. I actually think the “embarrassment” question imputes a bias with Q.
For me, the positives are that (1) Rubio and Gop-e attacks on immigration failed; Cruz was prohibitively perceived as the debate winner (again vis a vis Rubio); and that the result will carry the news for a while. Trump is nationally known- Cruz is still getting there. This poll will help his national credibility.
As for the solid question, there’s no doubt that Trump has a solid base of 15-18%.
And Cruz has a “solid base” of 10, according to your math. Good to know.