The reason is: aiohttp with disabled access log shows about 16,000 RPS on sanic's own benchmark.
It's pretty much faster than 3,000 RPS from the table.
I'm not a Sanic dev team member. You should not trust users to update this table but manage periodic updates yourself.
If you don't want to do it --- it's up to you.
Please just drop very incorrect and outdated numbers from README in this case.