Was through LAS on Sunday around that time for two of last 3 weekends. First in line at the Medallion check-in both times. The wait at security was a solid 30 minutes. It looks longer than it actually is. While waiting, they often opened up the C-side Check-in for D-Side Passengers as the C-side was not as busy. This accelerated the security process as well. Virtually all of the flights were sold-out...so I can not imagine it getting much worse than described above.

BTW..go right to medallion check-in. Curbside lines were long. Good luck.