For those interested a few blog post are slowly coming out on the licensing changes with SQL Server 2014. This blog post
has the link to the licensing page for 2014 and points out a few high value things that are changing.
As is stands you are now required to license all physical cores on your server. The blog post above shows a clear snapshot of the statement from Microsoft's license overview.
If you have a reseller telling you anything different than what that document states I would two things:
1. Show them what that document states.
2. If they still interpret that you are safe with their recomendations then be darn sure you get it in writing from them on company letterhead; would also get your legal and/or auditing department involved or at least make them aware.