I'm thinking that delaying some of that reform might well be a good thing in the long run since RttT overly promotes merit pay and other bogus "incentives", weird ideas about testing and technophiliac waste.
Then I get to the second part and I'm struck by the emphasis that evaluating "just once a year" will not help teachers improve, implying that it ought to be several times per year. I actually believe the study, but coupled with what I've seen in the past thirty years or so, "one evaluation won't help a teacher improve" because evaluations don't do much and repetitions of nothing are still nothing. I've had good principals who gave good evaluations that really were helpful but I've had many, many more that were useless.
Overall, the study seems typical of education research and education reporting.
Bottom line for me is that if they found that multiple evaluations each year were beneficial, they'd have said so. Since they didn't say that (and they would dearly LOVE to say that), then it can be assumed that they found no evidence so they fudged the report and let the reader assume.
I'm glad I use Thunderbird for my email, though, because it warned me about this email. Thinks it's a scam.