Earlier quoted context omitted.
Yes probably I am, because we are talking millions of sites and statisticly your going to get anomolies. Then again if your business model is based primarily on your SERPs then you have a bad business model and should be doing everything you can to mitigate that risk. It's one of the risks you take which should of been identified if your a competent business owner that wants to survive.
Your post has nothing to do with the previous message or point, you're just switching arguments. Most e-commerce businesses cannot scale /downscale every 50% + or - organic search traffic changes.
If your worried about this update then you haven't been doing seo right and If your relying solely on a 3rd party for the existence or profitability of your company then you have bigger issue at hand than just your seo.