Harry Potter and the Excess of Adverbs

Bede has some theories on what's going to happen in the last Harry Potter book. I'm glad he recently reread them all. I appreciate what J.K. Rowling has done in terms of getting children to read other 300+ page books while waiting for the next HP installment, but I find Rowling's writing style a little hard to take. Among other things, I get a little winded by the glut of adverbs. It was when Draco Malfoy's flunkies "guffawed sycophantically" that I had to put down the HP book in question and gasp for air.

Disclaimer: I'm not a member of the grammar police. I will never get into online debates along the lines of "You corrected my grammar but you made a grammatical error in your own correction, nyah, nyah." (If I find an embarrassing typo in your post, I'll email you privately. Please do the same for me.) Also, I don't want to ruin your enjoyment of the books to which you kvell. However, it is hard for me to read books when I can't lose myself in them because I keep tripping over stylistic quirks in the stories. That's all.

Another disclaimer: For some reason, Joss Whedon's penchant of transforming nouns into adjectives is charming. Color me inconsistent.