Yes but this poll was conducted in the last 3 days, making it the only poll to have been conducted so recently. A pollster is rarely this far off. There is a sense that things have been tightening. A poll out last night (and conducted longer than this poll) found Cruz ahead by only 5. It could be that 4/1-3 has seen a real Trump surge. After all, Mr. Trump is campaigning his tail off in Wisconsin!
We’ll know in a couple days, and if ARG comes close to the actual outcome I’ll be glad to acknowledge it with a hat tip.