Ads should never show a product functioning, unless it functions ALL the time for all people in all situations.
Cars should not be shown to drive down the road, because some people may hit an oil slick not depicted in the ad.
Cleaning products should not be shown to pick up spills, because there are other spills that can’t be picked up.
And clothing should not be shown that fits people, because it won’t fit everyone.
Apple admits the speeds are shortened (ad time kind of requires that for online products). As for the results? Some people get them just as shown. Some don’t. It’s obviously a widely varied experience.
If you think the product is low quality, try it, return it, or sue if they won’t take it back in a reasonable time frame. Suing over the ad itself (in this case) makes little sense except for the laywers!
I agree that the ad isn’t brutally honest. Nor is any technology ad. Nor is any ad for any product. Ads show the good side. I wish that wasn’t so! I wish fast food ads showed flattened, smashed burgers, not burgers that tower as tall as they are wide. I wish dating sites advertised that their marriage rate is lower than the general population. I wish cereal was not shown pouring in slow motion. Hard realism would be fun in ads! But that’s not how it is.