IMHO the betters think of relation of Poland vs. Germany as some friendlies were carried out before EC. But meanwhile Germany plays much better as than, while Poland was not that convincing so far, for example losing against Belgium. Therefore I think chances are near 50:50 with pretty good chances for Germany to upset host Poland, especially if the first set is won by the guests. But we will see in the evening, a five set match is likely IMHO.
I was thinking the same thing. But not entirely 50/50 I guess. It started with a much bigger difference though and now its already 1.5 vs 2.5
Turkey Netherlands seems to be 2.2 vs 1.6 now
Neither of these cases are clear favorites though as for example Italy vs Russia 1.3 vs 3.2 and not even mentioning Serbia vs Bulgaria with 1.05 vs 7.75
Ofc again this is in the end not that important, the bookies are by far not always right.