Why would you think it would be less popular? Most everyone that chooses us-east-1 chooses it because they're close to it and 1 is the first number. They don't research it before they start using it.
If people were experiencing significant downtime they’d leave us-east-1 or AWS. There’s no sign of that happening so I’d suggest that there’s a tendency to over-weight the degree to which people complaining in forums constitutes representative data.