What? This is revisionist as all get out, and it's not like a founder of reddit should be anecdotally referenced as a source for "reddit was always more popular than digg. they just had toolbar spyware" This comment is laughably ego driven.
The "v4 disaster" was the nail in the coffin where everyone left digg for good. Leaving digg for reddit became a meme in late 2008. It's no shock at all that by the v4 exodus in 2010 reddit was more popular. However 2007-2008 there were questions about which was a more compelling platform/format and which would foster a real community. By 2010 that question was answered, for sure, but "reddit always had more traffic but digg ranked higher cause toolbars" is borderline absurd.
