My friend will be starting in August! Their pay is 5k which is higher than ACN and big4 for fresh grads. Based on what I heard from interviewers at ACN and EY, it seems that ACN and EY's training program for fresh grad is simply throwing them into a project and letting them tag along with the seniors. Thoughtworks has this program called thoughtworks university where they put you with fresh grads from all over the world for a few months to attend their courses which teaches you tech skills and soft skills.

Not sure which role you applied for but based on what I heard, it seems that thoughtworks is more focused on implementation of solutions as compared to ACN and big 4. Thoughtworks' interview process involve pair programming