text: While it's been a decade or more since I went to St. Matthew, it doesn't look like a lot has changed.  I wouldn't characterize it as a mega-church (a la Charlotte's Big Pink Church) nor would I think that St. Elizabeth Ann Seton is akin to Houston's Lakewood (Osteen) Church.  Both are certainly larger than the neighborhood parishes of a century or more ago, but neither is a "sacred stadium".  
  Having attended both at various times (my job kept me moving a lot), I can say that both are fairly homogeneous suburban churches, though SEAS does have a communion rail that is used (believe it or not) effectively for a church of its size.