Exactly, the entire point of the quote was to get across the absurd magnitude of growth that we're seeing in a way that anybody can understand.
If you care enough about numbers and can figure out how to say it more accurately... more power to you I guess? Doesn't change the effectiveness of the quote though.
I think a better quote would be "By 2003, mankind had generated a shitload of information. Now we generate a shitload every day."