Its certainly gone up since the 1,200 you used to complain about a year ago.
(mr developer)
I never stated the wages in Poznan before,
Central Statistical Office of Poland (GUS) provided in 2009 that 65,35% of Polish wages are below Polish avarage wage and this is a fact.
The most common wage was 2.091,35 (about 700USD) All these are Gross so the minumum wage net , would be around 1200 zl Dole 560 zl
Will I be able to do well with 5000 PLN a month?
net?? if not, you'll be fine anyway, tiny one bedroom apartment outside the city.