Only two Episcopal parishes thus far, we may not see that many more. As I have written before, most orthodox Anglo-Catholic parishes and individuals within the Episcopal Church (which are proportionately fewer than those in the Church of England) have already left, aligning themselves with various "alphabet-soup" breakaway Anglican organizations. With the Ordinariate, I imagine we will see the few remaining Orthodox A-C parishes still in the Episcopal Church taking the swim.
Idle speculation: I wonder if any orthodox "medium-high" parishes (e.g. St. Thomas Church Fifth Avenue), seeing their A-C high-church brethren safely climbing aboard Peter's Barque, will be tempted to do the same. It seems to me as long as they faithfully observed the order and rubrics in the Book of Divine Worship, they could effect a "lower" celebration of
(Readers of a more scholarly bent than I should feel free to rip this speculative exercise to shreds.)
(Via the Ordinariate Portal, with thanks to Augustine).