My tour operator tells me that I should use a Visa service (PVS International) in advance of arrival in Istanbul, rather than purchasing the Visa right at the airport, as we arrive. They say that buying the Visa at the airport is EXTREMELY time-consuming.
Is this true, or is it a scam to funnel business to these Internet businesses that process the Visa application for you? Apparently the Visa for US citizens costs $20/person in Istanbul, but these services want over $150/person.