One few of my colleagues did some agency work for Walmart. A large web application for working in parts of their supply chain.

These guys are some of the best programmers I know and they had nothing but respect for Walmart tech teams.

The first time it came up that I made a casual assumption like "oh, they must be very 'enterprize-y' in their software development." and one of them corrected me by saying something to the effect of "You'd be surprised actually, they're not just surprisingly sophisticated technologically 'for an enterprise' but they're actually surprisingly sophisticated for anyone"

Anyways, small anecdote that stuck with me.

Walmart is apparently VERY strong in the IT side of things.