Polish fans have been superb tonight, wouldn't be suprised if they are the louder set of fans in the return game at Wembley
Only way they don't bring a good following is if the prices are over the top and not enough of the fanatics get tickets instead of some who live in England and will go but lack the passion of the more devoted Polish supporters.
That being said 300 of the more hardcore Polish would have no trouble out-singing England at Wembley, between the pricing, the nature of the English support (not arsed unless its a big rival in club/internationals) and the amount of people who come to football these days to be entertained rather than make some noise, the English support at international and club level at home is probably the worst of any major European country with the exception of Spain.
The away followings on average are far better, but still comfortably below some of the Greek, Croatian, Austrian and German supports (especially club level). Problem in England is people are so focused on winning the game that they don't bother creating an atmosphere when nothing's happening on the pitch, always has been a more reactionary sort of atmosphere in England. These European supports though just sing because its all they know, that and enough of a majority sing so you don't get a situation where you're the only person around you singing which always puts off people in England.
England, Liverpool, United, Chelsea, City, Arsenal etc all get easily outsung at home by travelling supports in Europe due to the above reasons I've stated. Only British side who can say on average they're louder are Celtic and that's primarily because of the Green Brigade and their transformation of the Celtic support.