Oh yeah those bullshit centres as they should be called. I was pretty lucky because I needed only to go through one round of classic interview and none of those centres. I really do not understand why they are sometimes needed for analyst positions. Its not like you will do much team work if any. Good luck with the search process sometimes it can be ridiculously stupid. But sometimes you also find great people that cannnot care less about your stutter and see the abilities you have and those they value :)