the official jfw deathly hallows prediction

I've decided I am going to break with my six-books-strong tradition of listening to the Harry Potter audiobooks and instead buy the print copy of Deathly Hallows and read it. My preference would be to listen to the audiobook, but I am unconvinced that I will be able to avoid having some source spill an unwanted spoiler on me during the several days it would take me to listen all the way to the end. So I'm going to buy the book at midnight and read it before I look at any news source.

I'm trying to avoid reading any speculation about the book because I'm sure pre-release spoilers are already or soon available and I don't want to read any "speculation" that is directly or indirectly influenced by spoilers. I am nevertheless here posting my own prediction regarding the content of the book, largely so that I can gloat when proven correct. However, so no one who prefers suspense has the truth revealed to them inadvertently, I present my prediction in code. If you want to read it, go to this site, paste the paragraph below in the "Input:" window, type "jeremy freese" in the "Key:" window, and hit "Decode".

Clv tdmuyigq ec xyi qli fj Sjhnv fj Bfjfrmp ajw esf rmrx "rwmclvv xgavw azmui klq myyiv kyazzzqq" (fj xlsx fej gakucixwph prqq csumry xx xyef ztfo efcfep) fgr yyex firxyid *bnvw* azmui klq myyiv kyazzzqq. Xf, tvgfjfcc psj ks Lsvac siull r lsjgayo, lq ffj xs vmn jfv Hmquiqgvc xf huc. Jogihx, clisgem jsqw hnzzgq, ntjwmtph e uigq jo qeulrrr ezb ufwwafuc vbbjfzriv fh lrzull siif wnx zrfm rfxmgr kc Uyyzqvhsji oei mz yimerui jru eorzrxiv fh Weebc, Mrvvq arpc putj rrh Nsuhvqapy nmpd hri. Rpem, fj er arnbgpuafspi vmpvvwegte vixpngkmze Wfaparp'w uiegwv xs vmcgy fqgsx wiwr jw rr msyysv xsa gymxbwvr, lspoarc ffwfykz xqiii igqc fi s wqstoull jizwrcc-wmhc urki larrtier xtirw arxy Jdci rrh Yixvxi.

BTW, word on the street here in Cambridge is that Harvard square will be transformed into "Hogwarts Square" on Friday night, including a battle of the bands between a band that calls itself "Harry and the Potters" and completely separate band that has independently named itself "Draco and the Malfoys."

(No unencoded predictions of your own in the comments allowed!)