This is the custom of most Orthodox parishes I have been to. Ours breaks the fast with only Antidoron, and not wine, but our parish is an exception, from what I've seen. I find the Antidoron to be very helpful in regaining strength after such a long time without eating (for us, usually from about 8 pm until about noon the next day).
I've never been to a parish that breaks the fast in the Narthex, as the Athonites do. Sure, some Slavic parishes serve half-harm-water/half-wine up near the front of the Nave, but that's different.
The Athonite monasteries preserve some of the older customs that properly separate certain actions into distinct liturgical spaces (e.g. Great Blessing of Holy Water outside in the courtyard's fountain; reading of the hours or Small Compline in the Narthex or Exo-Narthex, etc.).
After Communion, one processes to the Narthex itself, which is the space for "liturgical eating". If you didn't receive the Holy Gifts, then you have some Holy Water and antidoron. Sometimes, the Fathers serve wine, as ozgeorge mentioned. You also have wine and atroklesia in the Narthex at the proper time during the All-Night Vigil.