It could be true
There have been a number of services from Gdansk axed recently (see Gdansk thread). If the some of the massive wave of Polish immigrants is returning to their homeland, demand on all Polish routes will diminish.
I think Centralwings must be a basket case (their CEO seems to think so), so Wizz may pick up pax from them, but if the market is shrinking, the contraction of CW may not help overall.