As for Europe, I'm not comfortable giving a date because Europe operates heavily through distribution.
In the US, if Amazon or Newegg orders an entire container of cases from us, we ship directly from our China port to their hub. Newegg has three hubs in the US that receive cases from us, California, New Jersey, and Memphis. A container gets from China to California in about 20 days, give or take depending on a few factors. Then, since Newegg is an etailer, they receive it and the unit can show up for sale on almost the same day.
In Europe, there aren't many direct etailers/retailers big enough to take direct containers, so a lot more of the business is done through distribution. Which means, for example, that your local computer shop in Belgium is probably buying our cases from a distributor in France. It may take 26 days for the container to get from China to France. Then it hits the distributor in France and they go through their orders. Two small shops in Belgium, four small shops in France, a large shop in Denmark, some medium sizes shops elsewhere. It takes them a few days to sort those out and put them on trucks for local delivery. This can be as quick as one day or as long as a week, depending on a bunch of factors. And then once it hits the small shop, they could have it for sale that day or they may wait a day or so if they have display or storage concerns or something.
So to put it succinctly:
A container leaves China on a boat on April 1st, and lands in City of Industry, CA for Newegg 20 days later, on April 21st. It shows up for sale immediately.
A container leaves China on a boat on April 1st, and lands in France 26 days later, on April 27th. It takes 2-5 days for the distributor to sort the container and ship to customers. Customers receive anywhere from April 29th to May 3rd. Customers take an extra day or two to display the product or put it on their site, the product goes up for sale anywhere from April 30th to May 6th, more than a week buffer.
And this is only if it's France. Germany may add 2-3 days. Scandinavia another day or two. So on and so forth.
The fastest is usually people who live in Taiwan or Hong Kong.