It does not. He said that if we're using approximately similar times to establish identity, then by using that logic, it could also establish that Schestowitz was that alleged sockpuppet account. (Transitively, does that mean Garrett and Schestowitz are the same person? Have we ever seen them in a room together? Hmm.)
But honestly, anyone who ever spent any amount of time on IRC is used to seeing 50 people drop from a channel at once. That was usually due to netsplits, which isn't the case here since there was only one IRC server involved, but that wasn't the only cause. "Uh-oh, the IRC server got too laggy and couldn't service all requests within the configured timeout. Time to disconnect everyone!"