This is America, they don't count.
I've not heard that before. My brother-in-law is an OCA priest and I'll be talking to him tonight, so I'll get a better answer.
My understanding is like this.
Nowhere in Scripture is the idea of the trinity totally spelled out.
There's no mandate to baptize infants, and no mandate not to baptize infants.
Celebration of the Eucharist every Sunday isn't in there either.
AFAIK these are all traditions in the Orthodox sense. There's ample evidence that these things should be done, but ultimately it's a particular understanding of the faith which calls for these.
Protestants of different stripes reject some of these things. Some of them do it in good conscience because of a misunderstanding or ignorance of Scripture.
The interesting thing about this is the number of protestants who reject tradition based on strict adherence to Scripture, which itself is a tradition.
Enter cognitive dissonance.
I understand the Orthodox position on tradition to be that it is what glues your faith together. Stuff that Christians tend to agree on but which isn't explicitly spelled out, like the trinity, tends to qualify.
Sola Scriptura just doesn't cut the mustard, and as a seriously straying cradle Lutheran I think I can say that. There's no definition of Sacrament in scripture, so adding the condition that Sacraments must be commanded by Christ is, to my knowledge, precisely what the Orthodox would call a Holy Tradition of Lutheranism. So is Sola Scriptura.
What tradition is not, to the orthodox, is an excuse to tinker. There never was a Limbo in orthodoxy. They still don't recite the Filioque in the Nicene Creed - this despite the orthodox I've heard say out loud that the orthodox probably would have accepted it if it was discussed in council. And that matter is nearly 1000 years old.
Even though the Filioque was the single material issue that the schism seemed to be about, I'm pretty sure it wasn't the only issue. For instance, no orthodox Christian is fond of Augustine. I've never heard them refer to him except to explain what "those other guys" think about an issue. So I suspect that things were festering for a while between east and west before the schism.