100%. YouTube makes the skip button appear a few seconds after the start of the sponsored segment, and ends the skip a few seconds before the end of the sponsor

100%. YouTube makes the skip button appear a few seconds after the start of the sponsored segment, and ends the skip a few seconds before the end of the sponsored segment. That's their choice, and it's deliberate – it gives enough of a window for advertisers to get their message across, while still selling Premium users the notion that they've 'avoided' the ad.