I was an avid reading while in the borg and after. However, as a JW I merely skimmed through Watchtower publications, preferring to read history and politics and still do. As others have mentioned the publications of the Freddy Franz era, though kookie, did take more than a 5th grade reading ability.
I should also mention that while in the JWs I read almost every book that Hugh J. Schonfield wrote including the Passover Plot and the Pentecost Revolution. Of course I left the borg in 1984 when it was a slightly different religion than present day JWism.
During my JW years I read the Bible Genesis through Revelation only once, and I was an elder. Back then most of the elders that I knew rarely read the Bible and barely kept up with the latest Watchtower magazine. Moreover, the Bible that I read cover to cover wasn't the NWT, but the New English Bible which included the deutrocanonical books not found in the NWT. Since leaving the JWs I've read the New American Bible and the Today's English Version.
Currently I'm reading Wild Bill Donovan--The Last Hero by Anthony Cave Brown.