Did Paul's converts turn from idols in every place he preached?
Yes, the pattern held true everywhere Paul gained converts: they turned from idols to the living God. The context states this would have been true in every place, as seen in Thessalonica and Macedonia/Achaia, showing a consistent turning from idolatry to the living God.
Les explains that the people in northern and southern Greece, Macedonia and Achaia, demonstrated how Paul’s entering in among them led to a turning to God from idols. He notes that Thessalonica was in northern Greece near Philippi, and that every place Paul gained converts this would have held true—they turned from idols to the living God. Les further emphasizes that this took something, because new believers coming out of a totally different culture faced pressure and intense persecution from idolatrous friends and relatives.