Check the Fleet Config tracker thread to determine the PMCO E+ conversion schedule. As it stands I believe the 752 fleet is the only one that is complete, 738 is about half done, and I believe the 772, 764, and 753 should all be done by summer.
With that said until the conversion is complete there is no way to tell if you will have real E+. A 738 w/o E+ may be swapped for a 738 w/E+, a 753 w/o E+ may be swapped for a 752 w/E+ (domestic only), etc.