In reply to Johan Andersson.

Scalability is actually one of EIGRP's main attributes. In fact, EIGRP is deployed extensively in the WAN, to support Branch connectivity, specifically for its scalability characteristics.
With respect to VRF-LITE/ EVN scalability, I would say it depends on the network configuration, the number of VRFs supported, and the number of prefixes and router peers. As customer scalability requirements are growing, we are exploring ways in which we can scale EIGRP even more than we have to date.
If you would like additional information on EVN, please access the following URL (http://www.cisco.com/go/evn) .