With Turkey, I find that a quick start is important. If things go well at the beginning (Persia humbled, Mamelukes reduced, P-L distracted) then Turkey does become unstoppable. Persia and Egypt are full of money and have CoTs, meaning more money, meaning quick tech. Here military advance, cheap infantry and 1492 conscription centre in Thrace mean that an aggressive and fortunate Turkey will be a juggernaut. Colonial policies are unimportant, so more money can be churned into the military.
If Turkey runs into trouble at the beginning, though, her enemies will pick her apart, and it will be difficult to recover momentum. Major battlefield defeats, desertions, revolts, three fronts...these can conspire to hamper Turkey. With the colonial powers (France, England, Spain) it is possible to recover with the revenues from overseas. Turkey will be luck to have five or six decent colonies, so recovery from a poor start is more difficult.
As for the Greek revolt, make sure you are playing the IGC, as there is no Greek nation in the ordinary campaign.
Porcius
If Turkey runs into trouble at the beginning, though, her enemies will pick her apart, and it will be difficult to recover momentum. Major battlefield defeats, desertions, revolts, three fronts...these can conspire to hamper Turkey. With the colonial powers (France, England, Spain) it is possible to recover with the revenues from overseas. Turkey will be luck to have five or six decent colonies, so recovery from a poor start is more difficult.
As for the Greek revolt, make sure you are playing the IGC, as there is no Greek nation in the ordinary campaign.
Porcius