ok just checked, last year on 25th august they said 22 million sold in europe (not sure if europe or europe+pal and no clue if shipped or to customers)
our numbers only for europe
8th december 2012: 27,549,976
13th august 2011: 20,227,783
so, when sony said pal and europe 30m+ we have ~2,450,000 less for euope and last year we had ~1,800,000 less for europe as they said (but like i said, no clue if it was also sold to customers last year and if only euope or also rest of pal)