OK, so far we have"
0 1 hand,
2 2-3 hands,
0 4- 10 hands,
0 11 - 50 hands,
0 not possible for any certainty, and
3 that are attacking the hypothetical question, lol.
There is enough information given in the scenario for an honest response, methinks.
The dealer does not always cheat as the game will present you with a new dealer each time, who may or may not be a cheating dealer. I think that is fairly clear, but just for the slow section, there it is, maybe some of you can answer the question now. (But I wont hold my breath).
Never...the deck is stacked and it's not the dealers fault.