Just visited my local, San Antonio, Costco - they have not yet raised their iPad prices. Looks like they are sold out of 13 inch MacBooks but all versions of iPad being sold below previous retail prices before the hike. Example iPad A16 $329.
I noticed that too, at least for the base iPad. But only in warehouses as inventory is available. $349 to $449 in an instant everywhere. Same in military exchange stores (where I bought before increase).