Much of upper Silesia is today mixed territory of Poles from East driven out of their ancestral homes from Lithuania, Belarus and Ukraine, mixed together with local Germans, Poles and Silesians that were not driven out (authocthons) by Soviets. Am I correct?
Generally yes, although I don't think these days many over there identify themselves as some "ex-Kresy" people, grandchildren of people, who came there in late 40's rather see themselves as locals now, additionaly many people came there from all over Poland in 60's or 70's when more workers were needed to increase industrial production, at the same time many Germans were leaving as commie authorities became more lideral on giving them passports.
The German population was deported from their ancestral homelands.
That's pretty much what I wrote. Do you want to add something ? You seem to feel a need to provide us with additional comments on this issue.