Ahh, I get it. We're answering different parts of the OP's question.

You're responding to the "will the impedence be higher ?" portion and saying "no, within the operating range of each speaker the impedence will be pretty much the same as indicated on the graph".

I'm responding to the "what will the graphs look like ?" portion and focusing on what the impedence will be OUTSIDE of the operating range for each driver.

The good news is that we're all saying the same thing

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8