Polyphony: GT5 Prologue has sold 3.67mil.

[wholikeswood]

United States - 760,000
Europe - 2,160,000
Japan - 650,000
Asia - 100,000

http://www.polyphony.co.jp/english/list.html

 

This indicates that digital sales off the PSN Store stand at 0.62mil / 620k, since VGC tracks 3.05mil physical copies.

Incredible for a demo. Real thing will do gangbusters...