CIO Advisory / IT Strategy - Need advice - McK, PwC, Booz, OW

I am looking at a lateral jump in around 6 months to an year to a few specific firms and their technology practices.

In particular order of preference -

McKinsey BTO
PwC CIO Advisory
Booz Digital Business and Technology
Oliver Wyman Operations and Technology

I am wondering if any of you current work/have recently worked in these practices to give me some insight on the kind of projects you do and the recruiting steps. If you guys reply, I can send you a PM to discuss further.