Been out 10-12 years. T14 (and not necessarily the bottom half of that) with cum laude/honors/Stone, AIII clerkship, 5 or so years at a V20, 5 or so years at a reasonably prestigious government gig with multiple first chair assignments (resulting in a half dozen or so published decisions), well-published (5-10 publications, including multiple law review articles (one in the top 25)).
First, I've been asked for my law school transcript multiple times in the past few years. Most of those were law schools thinking about hiring me. At least one (tenure-track) job I was told I didn't get because my grades were too low. And looking at the faculty there, they probably were.
Second, I've been on the other side of the hiring table many times, including at that government agency (where I did mostly appellate work). What I would say about grades is this: If the person's resume looked right -- decent clerkship, T14 school, some honors designation (aside from the YLS and SLS people), some journal -- we didn't really look into the grades. If it didn't, we did, and they were dispositive. I distinctly remember lawyers 5+ years out with mediocre grades from T14 schools or less-than-top grades from a second tier school that we decided not to hire because we didn't think they were smart enough. I also remember lawyers with good grades who had a sufficient explanation for why they weren't on a journal (stupidly didn't participate in the writing competition) or didn't clerk (wanted to do corporate stuff out of law school) who we did hire. The point is that the grades told the story in both cases.