Right, there is a lot of context to every finish of every primary. I'm not sure why multiple people are being lectured by this poster on their "understanding of elections" but yet that same poster is acting as if primary finishes are black and white. The delegates, vote totals, trends, etc are not black and white issues.
I try to use polls as indicators, look at them as detailed as possible, and draw trends. In the end, though, the results are going to be our only true information. (Except Iowa, because those schmos can't figure it out)