Can ManagedTokenOrganizationServiceProxy be used without ADFS/STS

I am working on building custom applications that interface with MSCRM using the OrganizationService using on-premise AD auth. In the future we might switch to using ADFS with STS on premise and I would like to ensure that I do not need to change the upstream code significantly to handle this. The CRM best practices guide mentions that the SDK has a ManagedTokenOrganizationServiceProxyclass that derives from OrganizationServiceProxy which handles token management/refresh. Can this be used in lieu of the OrganizationServiceProxy class even if there is no ADFS/STS? Will the behavior downgrade to that of the OrganizationServiceProxy in absence of an STS and when the ADFS/STS is implemented would the behavior upgrade to token based authentication?

I have a facade in place so that the upstream code does not consume these concrete classes directly and uses IOrganizationService instead. I would like to understand the behavioral differences between the two, especially how the Auto Refresh token functionality works with and without an ADFS/STS behind the scenes and can I simply use the ManagedTokenOrganizationServiceProxy currently without ADFS/STS in place without any gotchas?

UPDATE: The SDK has a ServerConnection class which has an GetOrganizationProxy method which in fact uses ManagedTokenOrganizationServiceProxy if the EndPointType is set to *ActiveDirectory*.
I ended up deriving from this class and overriding the GetServerConfiguration like so since the default implementation is Console based and prompts the user for credentials, and I am looking to host this in a library:

public class DerivedServerConnection : ServerConnection
    {
        private Configuration config = new Configuration();

        public override Configuration GetServerConfiguration()
        {
            string serverAddress = "<server>.<domain>.com:<port>"; //read from config file   
            string orgURL = @"https:<someURL>/OrganizationService.svc"; //read from config
            Uri organizationUri = new Uri(orgURL);
            Uri discoveryUri = null;
           if(orgURL.StartsWith("https",StringComparison.OrdinalIgnoreCase))
           {
               discoveryUri = new Uri(String.Format("https://{0}/XRMServices/2011/Discovery.svc", serverAddress));
           }
           else
           {
               discoveryUri = new Uri(String.Format("http://{0}/XRMServices/2011/Discovery.svc", serverAddress));
           }
           AuthenticationCredentials a = new AuthenticationCredentials();
            a.ClientCredentials.Windows.ClientCredential = CredentialCache.DefaultNetworkCredentials;
            Configuration config = new Configuration
            {
                 ServerAddress  = serverAddress,
                 OrganizationUri = organizationUri,
                 DiscoveryUri = discoveryUri,
                 Credentials = a.ClientCredentials,
                 EndpointType = AuthenticationProviderType.ActiveDirectory
            };
            return config;
        }
    }

-Abhijeet