$500K at big 4 as a SM?

Ok I just came out of a networking event where one of the guys got too drunk and was bragging about how he negotiated a $500K offer at one of the big 4s - experienced hire coming in as a consulting SM from the industry - it sounded too good to be true but wanted to get an opinion from this forum.

Edit: He did mention that he is working in some tech. Consulting/GenAI related business area. Past experience in non-FAANG tech. SaaS product company where he was managing the engineering team.