yeah this guy has it a bit mixed up... El-P definitely belongs in the top 20 for being totally unique and progressive along with the handful of other more recent producers on here I am familiar with.
The top 10 seems to focus on the producers that laid the styles for the modern day which is maybe why Flash isn't there I'm guessing... again why Kanye West is there I do not know, his productions aren't exactly a revelation, whereas Timbaland changed things for better or worse.
Rick 'fat beard' Rubin is overrated too, the 'heavy metal/hip-hop fusion' thing being a novelty, so kick him right down the list. It's really interesting that Pete Rock is chosen for number two... I'd replace him with Prince Paul or Eric B