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Not exactly. The loads are high due to the diamter the braking loads act over the hub flange. If you had a symmetrical disc brake hub the situation would be the same. the tension changes on the rotor side is not proportional to the static spoke tension. The tension changes will be dependant on the torque applied just like on a rim brake rear wheel with the exception that unless your chris hoy you cant apply disc brake torque when pedalling.
cycleclinic
Brommers
Yup, so there's different forces on the spokes with disc brakes, but that's more to do with them acting more on one side of the wheel than over the whole wheel differently. I can't remember what the first point was but maybe that's relevant to someone's thinking, I skipped over all the mathsy stuff.