Let's just say...your blanket statement that contraception is 'allowed' is perhaps a bit excessive.
Along with many issues, this topic is being debated. There are some jurisdictions within Orthodoxy that have a more liberal spin on the issue than others. Still, how do you reconcile your statement that appears to indicate church sanction for birth control with this article, placed here as an example of a conservative opinion?
The point here is that the issue is considerably more nuanced than you describe.
Welcome to the forum, btw!
I've read that article several times before. Back on CAF, this article was referenced more than once, particularly the part about the Greek Encyclical of 1937. Fr. Ambrose (Irish Hermit over here) requested several times to see a copy of this encyclical, but I don't remember anyone ever finding it.
The article, while perhaps a good source of information about Orthodoxy, does seem to sell Catholicism short. It contains the following statement: "This teaching of our Church, however, should not be construed as being the same kind of teaching as is found in the Roman Catholic Church. The consistent teaching of the Church of Rome has been and is that having children is the primary function of marriage."
This may very well be true, but I think one should add that the Catholic Church sees great value in the unitive aspect of sex. The Church allows a husband and wife to engage in sex even when they are quite sure the act will not be fertile. However, they must always be open to the possibility that it will be.
People can toss out patristic quotes about Petrine primacy all day long, and it doesn't really convince me. However, I do believe the Catholic Church holds the moral high ground on the contraception issue. To be sure, some traditional Orthodox Christians agree with the Catholic Church on this, but if this forum is any indication, there is a variety of thought on the matter within the Orthodox Church.