No, they implement fair queueing in which each TCP stream can be (virtually) assigned its own output queue and equal share of uplink bandwidth. So if an upload stream and a download stream are filling the uplink, packets in the upload stream output queue are dropped first and those in the download stream output queue (mostly ACKs and small in number) are likely to survive. I am happily using ALTQ/WFQ on my NetBSD router connected to the cable modem in order to avoid this problem.
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No, they implement fair queueing in which each TCP stream can be (virtually) assigned its own output queue and equal share of uplink bandwidth.
So if an upload stream and a download stream are filling the uplink, packets in the upload stream output queue are dropped first and those in the download stream output queue (mostly ACKs and small in number) are likely to survive.
I am happily using ALTQ/WFQ on my NetBSD router connected to the cable modem in order to avoid this problem.