I'm sorry to disagree with you, but that's simply not true. My site was manually reviewed after downtime and removed from the SERPs in a matter of hours.
That was on the 11th of August.
I then spent a week reading everything I could to fix whatever possible problems Google might have identified.
The Reinclusion Request was submitted on the 18th August.
It was accepted - and the site reincluded - on the 20th September.