It's gonna be easy for PVV to be the largest party.
Possibly but the Dutch electorate is nowadays extremely volatile (a far cry from back in the day when the country was so pillarised the electorate were pretty boring). I wouldn't be hugely surprised if the final election is completely different from current polls (neither would I be surprised if the polls are bang on atm and the country is plunged into an ungovernable mess).
Yeah. 1 month before the 2012 election the SP (socialists) polled at 35+ seats while the PvdA (social democrats) polled at 15-20 seats. The PvdA ended up winning 38 seats while the SP won only 15.