You may want to cross-check with NetApp what they meant by recommending iSCSI as iSCSI more commonly used for providing blocks of storage, rather than the storage of individual files. It can be particularly useful in rolling out technologies like failover and virtualization clusters, as the same chunk of storage can be accessed by multiple servers. I'm using it at home to run VMWare VMs on noisy servers in the garage, from my main storage/display box under the TV.
NetApp is also able to use Active Directory to secure files via Windows style groups and permissions, or it wouldn't be able to say that it support CIFS. This capability, joined with good performance and their snapshot filesystem, were critical to their sales success -- so something's been lost in translation somewhere.