Offcourse, C Band is more affected. When i was using cable connection i would check all channels right from 9.30 am to 1pm, phase wise channels used get outage for 5-15 mins.
The message TS CC gave is for C Band, that the channel will go off from broadcaster side. Ku Band i have not faced outage last year. Never seen a DTH show No signal from STB due to this. Max i saw pixelation but dont know if from broadcaster side or TS side.