iOS Table/grid view like in iPad app store??

I've always assumed that each is an entirely custom view laying out the rows/columns as needed.

You can actually examine the App store HTTP traffic, and dump the HTML. It's mostly divs inside one or a few big webviews. Very little table view stuff, if any.

firewood, why do you think that because the data from the store comes as html that the display in the appStore app is a webview?

I think it's probably a table view. The data may come as html but it can easily be parsed and then used for display of the rows.

A few things that make me think it's a tableview and not a webview:

In general the appearance is of a table view.
In particular the chevron disclosure indicator looks like the table view one.
The images load lazily. I think that a webview would load all the images as quickly as it could.
The selection of the row when you tap it and then the deselection of the row when you drag it is exactly how it works in a table view. I think you'd have to implement this in javascript to make it work like that with a web view.

While it might be possible to do that with a web view the interactivity will not be so easy to do and all of that works in a straightforward way with table view.

Please see this thread where this topic is already being discussed:

What are the UI elements in the itunes and marvel app??