It's not that Cert takes longer, its that they announce "in Dev" now, which is completely worthless as a heads up, because it could mean pretty much anything. Before "in cert" meant they had sent it off for approvals, it was done, out of their hands. It was ONLY waiting on approvals, so it'd be out in a couple days barring any issues. "In dev" means... the team started converting the PC updates and it'll be done when it's done, THEN go to cert.
It used to be they didn't announce until it was actually in cert, which meant it was a couple days away. Now they're announcing when its "in development" which can mean literally anything and is completely useless as a status since that could mean "it goes to cert tomorrow" or "it goes to cert in a month." It's a worthless notification..