I'm an upcoming A0 at T1 firm. I was excited to receive an offer from the Cap Marks team but in the past few months, reading a lot of threads on LI and also interacting with a few people I feel that Cap Marks is just very overworked.

Is it the same with other practice areas in T1 firms or is Cap Marks the winner of "the worst work-life balance and zero weekends" award?

It is the same with other practices in the firm. In fact, it has become a kind of norm to work round the clock or a USP for these firms to be available 24x7! Welcome to the slavery! Just focus on the money and you wont feel the pain in the longer run.

As a person who has no social life and likes working i wish i were a part of the CM team.