Legalese

For all those working in buyout, how deep / thorough is your firm in reviewing legal documentation? 

I've only seen how it works at my current shop and we get pretty deep / read through everything, which I figured was normal. Though I was recently on the phone with our counsel who suggested that plenty of other sponsors don't even open docs / ask questions that often, which was incredibly surprising to me. To ensure all on the same page, I'm talking about pretty basic things like purchase agreements, MIP docs, credit agreements, etc

Won't change my life or how I have to go about things in my current role, but trying to get a sense of how much this varies by firm and what's the most common approach