White line/ice may have contributed (not really) but more likely the tires were still cold and not warmed up yet plus 'Dead Sticking' the throttle was the biggest contributor (engine rev'ed out to about redline) and then chopping the throttle closed was the final nail in the coffin.
What tire/tire size are are you running in the rear and what pressure are you running? The pressure readout on the dash is great for knowing if your tires are still cold and not warmed up yet.
It is all about throttle control. Pulling in the clutch? - another unsafe idea. I would bet you dont have Steve's flash on your bike.
I have gotten caught in snow storms on my CB750 when I lived up north. You learn throttle control real quick especially going up a hill. Going down steep hills was the hardest part. 
White line/ice may have contributed (not really) but more likely the tires were still cold and not warmed up yet plus 'Dead Sticking' the throttle was the biggest contributor (engine rev'ed out to about redline) and then chopping the throttle closed was the final nail in the coffin.
What tire/tire size are are you running in the rear and what pressure are you running? The pressure readout on the dash is great for knowing if your tires are still cold and not warmed up yet.
It is all about throttle control. Pulling in the clutch? - another unsafe idea. I would bet you dont have Steve's flash on your bike.
I have gotten caught in snow storms on my CB750 when I lived up north. You learn throttle control real quick especially going up a hill. Going down steep hills was the hardest part. 
I love people who have no clue what they're talking about and just spout wisdom like it's the gospel.
Tires were cold.... Hrm... How do you know? How far did I travel before my accident? Even in cold weather traveling at 55 tires would be warm in a couple of miles. I had traveled 15 before the accident... So yeah 1st thing you're wrong about...
Did you view this on a phone or small PC screen? I have this video in full 1080 HD and watched it many times on a 55" LED TV. You can clearly see a dark line of "moisture" in between the lanes As I'm coming up the ramp. Moving from the ramp to lane 1 I was traveling at 50MPH. As I moved to lane 2 I accelerated from 55MPH to 60MPH. Drivers Ed 101 tells you to always accelerate slightly when changing lanes. I did not dead stick it or nail it or anything else except accelerate from 55 to 60... When the tire went from traction to absolutely zero traction going over that icy white line the bike rev'd. Ultimately it was absolutely my mistake for not seeing the ice on that lane. Your assumption that I was doing this or that is just clueless.
Chopping the throttle closed... Yeah that kind of happens when your hand leave said throttle.
Tires... Because I'd have no idea what rubber to put on my C14... Pr4's front and rear. 55 rear 42PSI front and rear.
Pulling the clutch.. Playing Monday morning QB sure... Shoula coulda woulda... Bottom line is that you couldn't even see ice in the video... I was not expecting to hit ice on a single 3" wide 3' long line I just happened to be lucky enough to hit. It was absolutely the reason the tire broke traction.
Oh and your last great assumption. You lost that bet. I have a full muzzy exhaust and Steve's flash for it. So yeah... Wrong again there Einstein...
I posted the video many times to both these forums and the COG FB page to educate people. ATGATT, never assume the winter roads are all clear and last but not least if you don't have a clue maybe it's better to not make a fool out of yourself....