If you can read this, then POSIX ACLs across NFS are working.

This directory has the following UNIX permissions:

drwxr-x---+ 2 njd33 ncs 512 Jul 17 15:35 .

However, it also has the following ACLs:

user::rwx
user:48:r-x
group::---
mask::r-x
other::---

This permits user 48 ("apache" on the webservers) to read and traverse the directory.

Try it yourself with the following commands:

setfacl -m user:48:rx some-dir
getfacl some-dir