I'm not sure it's the same as what GP is saying. Maybe anecdotal, but living in Italy I had a very hard time finding a lot of things. Even getting basic mail delivery was pretty difficult. Same with Spain, to varying degrees.

As another example, visiting the Netherlands, it would take a week to get a decent child car seat delivered last year.

Comparing with the US, it's night and day. I can order something at 6AM and it's at my doorstep by 10AM. And the number of goods that are offered at that speed is absolutely astonishing.

As a side note, what the US has done to the shopping experience may not be preferable when considering all related effects on the market, happiness, etc. But it certainly sets a very high bar if you are comparing to Europe.

EDIT: I almost forgot to mention that all of this magical instant delivery is free!