Erik, cc (plus) can actually do an okay p&g on my slushbox. Nudge to neutral to glide (that auto disengages the cc), nudge back to gear and tap resume to pulse (the acceleration on the pulse is actually quite optimal). Above lockup speed however, I can't detect any improvement using P&G.
It was funny, I'm in our stick Accord and sensed no load on the tranny while driving at a city speed, so I nudged it into neutral to glide. The cruise was still engaged and I wasn't thinking (no clutch or brake was engaged to disengage the cruise). Luckily it wound up quite slow and the stereo wasn't too loud so that I caught the engine as it not much after it hit 5K...