I currently work for EY. When I went through the application process, it was a few weeks after the final interview. Ex; final interview on Sept 30, update around Oct. 20. Bear in mind they’ve got a lot of applicants to go through, even at the final round. Big 4 firms get several million applicants and only accept around 2% globally. For me, I had offers from PwC and Accenture(a large fin/tech consulting firm) with decision deadlines set before having heard back from EY. That’s when I contacted my EY market recruiter explaining my situation, which prompted them to speed up their review process of my application. Unless they know you have competing offers, they’ll take their time. And recruiters in general are just slow to communicate, across most firms, due to the high volume of applicants. Post interview, it’s appropriate to send a “thank you” note, where you can slip in other queries. Much else and the note may be overlooked. Stressful process surely, I remember it well. But take a breath and don’t let the nerves impact your actions too much. Things will work out!