Taken from another forum.

 

Re: Supermassive Blackholes

 

What are your thoughts on these? I think they are literally fountains of youth for our type of stable star environment. In the early stages of the Universe they quickly coalesced and formed supermassive blackholes, And with a larger event horizen the more hawking radiation would be emitted. These could be massive unimaginable in size jets of raw energy, which helped seed the early universe. You still see supermassives almost everywhere. And I am willing to bet our galaxies are the aftermath of the early, furious quasar like past of our little island. The supermassive now at a more stable size (but still hungry, pulling in unfortunate stars near the core of the galaxy.

Your source knows nothing; it is the smaller black holes that emit more Hawking radiation.