I'm not sure how much it matters, but Sergei Davydov says the acrostic (insomuch as it exists) was "discovered by Morris Halle." See here:
http://community.middlebury.edu/~sdavydov/'Pushkin's Merry Undertaking and 'The Coffinmaker,' in Slavic Review, vol. 44, No. 1 (1985), 30-48.pdf
As for the review of Verses and Versions, I have to say that I admire Carolyn's remarks. I found the review a fair contribution to a larger conversation.