According to Polish links it wasn't Benhakker who asked him but Michał Globisz (Poland's youth team coach).
Anyway in an interview for The Times Poland he said that it's a hard decision as Italy and Poland both mean much to him.
'If I would been called up for Poland's squad, I'd be proud' - Which doesn't mean of course, that he'd agree
89% of online poll respondents voted for calling him up.
In my opinion, it lookes like he's a little surprised with the matter and trying to be polite, but he'd prefer Italy (for obvious reason I think).