I wasn't baptized Orthodox, only chrismated, but I definately wasn't cured. While there are certainly texts which seem to indicate that God will rarely cure people of physiological issues (e.g., a barren women gives birth), I seriously question the practice of "just having faith" in mental illness cases. As Sirach says:
Hold the physician in honor, for he is essential to you, and God it was who established his profession. From God the doctor has his wisdom, and the king provides for his sustenance. His knowledge makes the doctor distinguished, and gives him access to those in authority. God makes the earth yield healing herbs which the prudent man should not neglect; Was not the water sweetened by a twig that men might learn his power? He endows men with the knowledge to glory in his mighty works, Through which the doctor eases pain and the druggist prepares his medicines; Thus God's creative work continues without cease in its efficacy on the surface of the earth. My son, when you are ill, delay not, but pray to God, who will heal you: Flee wickedness; let your hands be just, cleanse your heart of every sin; Offer your sweet-smelling oblation and petition, a rich offering according to your means. Then give the doctor his place lest he leave; for you need him too. There are times that give him an advantage, and he too beseeches God That his diagnosis may be correct and his treatment bring about a cure. He who is a sinner toward his Maker will be defiant toward the doctor. - Sirach 38:1-15
I struggled for most of my life with Tourettes and it's consequences*, depression and suicidal issues, and finally just started really getting help this year when I was diagnosed with bipolar disorder and given meds.
*Most people tend to lose the overt Tourettes symptoms in their early teen years, though ADD type issues continue into their early adult life.