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Across a sample size of 12 trips total.

That was a disappointingly small sample size given the nature of the magazine, I agree.

On the other hand, I doubt this technique has been tried with hundreds of bikes yet either. So everything about these statements could just be worthless information I suppose.

That may be a study with similar intent, but writing "fragile" or "this side up" definitely feels like it should have a significantly different psychological effect on the handler than that of an image of a TV.

It's about breaking something tangible rather than being told what to do.

I would be tempted to sort of accidentally drop the package, just so that I could guess what it is by the sound it makes.