This blog highlights the usability of NFS with the advent of better technology available today.
One of the key area they highlighted was the storage protocol they choose, which is NFS rather than iSCSI and FC SAN, which was mainly due to the flexibility of volume shrink or re-size that could support on the fly. I am agreed with their statement as personal thought, for large scale deployment, NFS are much easier to iSCSI manage compare to iSCSI and FC environment.
NFS is pure ethernet IP base, which certified and proven in many of the large scale deployments worldwide. With 10G Ethernet today, performance throughput on the NFS will no longer concerns over the performance. If you had not evaluated NFS as an option in your deployment currently, you may want to take a try on it.