The Low Church segment is a very large segment of the ECUSA and was even more dominant then.
They were much larger then, unfortunately now the Liberal Catholic and Liberal Broad Church segments are dominant. As far as traditional low church ECUSA parishes, that would be considered the most conventionally Protestant, as opposed to Broad Church parishes which represent what Anglicans like to call the via media, these have become quite rare in the Episcopal Church, and to a very large extent most low church or Evangelical Anglicans have left for ACNA, leaving behind more liberal broad church parishes. Likewise, conservative High Church and conservative Anglo Catholic parishes have become quite rare, although I am aware of one, St. John’s Episcopal Chuech in Detroit (which I thought was Continuing Anglican, indeed I was almost certain it was Continuing Anglican, and was genuinely shocked to discover it is still in the Episcopal Church).
We also don't have the most recent numbers for Orthodoxy, but they're not going to jump that much.
I should expect they will show much more of a jump (the jump is due to the end of the pandemic which was adversely affecting us due to illegal restrictions on worship) and the recent influx of converts, whereas the Episcopal Church is continuing to lose members at a very high rate (if it continues, they will be gone by 2050, but I expect their membership will bottom out at some point, as happened with the UUA, which after alienating nearly everyone, now shows growth, albeit at the expense of the liberal, but less authentically or consistently liberal, mainline Protestants).
But I will say I am shocked our average attendance now equals that of the Episcopal Church, that is still very good for us, but also very sad, when you consider how many American cities have large, imposing Episcopal parishes - they must be mostly empty, and the much fewer and generally much smaller Orthodox parishes mostly full, to attain such a result.
I would particularly like to compare the statistical mode of attendance in Orthodox parishes with Episcopal parishes, because I figured on the basis of median average attendance, given how Episcopal parishes do tend to fill up for seasonal services like Christmas and Easter (for example, 9 Lessons and Carols), that it would throw the mean average in their favor to such an extent that they would be twice as large as us. Of course, since the statistics you refer to are average (presumably mean) Sunday attendance, that probably cancels out Christmas services except for in 2023, when Christmas Eve on the Gregorian Calendar fell on a Sunday, which, unless they compensate for it, will cause a huge bump in 2023, which would only be partially compensated for on our end since ROCOR, the Serbians, ACROD (at least their cathedral), the Georgians, and other jurisdictions (including if I recall the massive OCA Archdiocese of Sitka and Alaska) use the Julian calendar (although effective last Christmas some churches switched to the Revised Julian including the UOCNA, and Holy Virgin Mary Russian Orthodox Church in Los Angeles, which is under the OCA, broke with its normal tradition and celebrated Christmas on the Revised Julian calendar, at least in terms of streaming, although lately they appear to have returned to using the Julian Calendar except for the English language services they have in one of their chapels, which are on the RJC).
Nonetheless, a distortion can be expected in the raw 2023 data.
