I'd say . The crash is buildings delivered is startling. -50% from peak?
Quite a few of the posters on this thread have commented that what happens in the USA and the UK will inevitably happen in Poland. The attached link to an artical in the Mail today, might explain to you why prices are not crashing in Poland.
"In 1968, when the first of the Baby-Boomers were beginning to think about settling down, 425,000 homes were built in Britain. Last year, the total was just over 100,000 - fewer than in any year since 1923. With figures like that, of course, the cost of putting a roof over your head rises."
Poland has a population which is 2/3rds that of the UK, but, it has a much older/poorer quality, housing stock. Whilst I disagree with Paxman on much of the artical, his comments on housing and affordability are unfortunately, very truthful.