Yes, but with sufficiently high polling frequency it doesn't matter very much. (It is true that each hub may add latency, as your sibling comment noted.) Regard

Yes, but with sufficiently high polling frequency it doesn't matter very much. (It is true that each hub may add latency, as your sibling comment noted.) Regarding the "interrupt on the bus side", I may have expressed myself badly - I meant PCI(e) bus.