I have not come across many large Orthodox families. But I was raised a traditional mainstream Protestant, and at our rural church there were many large families.
There were two families that had 8 or more kids. Many had 3-6 kids. (I have 20 cousins; my childhood best friend had something like 30 or 40 cousins.) Having 1-2 kids was uncommon. Having no kids meant you had recently been married or had conception problems (which was met with great compassion, BTW), but it was unheard-of to electively have a small family.
Nobody was particularly wealthy, and many were one-income households. Everyone lived relatively simply, but I never got the impression that anyone was destitute because of their family size. Everybody got by on their daily bread, which was all anyone prayed for. (Maybe that's why the stereotypically convert ideal of 19th century Russia has always appealed to me—because it's more like the way I was raised than modern Citydoxy.)
Personally this outlook appeals to me as well. But then, I have mostly lived in rural areas and I think that is more conducive to large families. And while I have no "skin in the game", the commonly-heard objections don't hold much water with me, because it completely goes against my experience of observing people live this way.