Turkish Airlines uses the European style business class seats on some narrowbody flights and you will get the typical economy class seat with the middle seats blocked. I presume the seat pitch will be better than regular Y - 34-35 inches.

But TK also has some narrowbody aircraft featuring 2-2/real business class seats, but honestly your guess is as good as mine.

Unless you are flying 737-900ERs, just be prepared for those European style business class seats.

Carfield