William Power of R.W. Baird in a note to clients this morning reported that Apple’s iPhone 4S was “sold out at the vast majority of stores that we checked with, with many stores notifying customers of device shortages in their automatic greetings.”

Tiernan Ray reports for Barron’s “Stores are taking pre-orders for the phone or creating reservation lists, he found. Power thinks Best Buy is a ‘litmus test’ for iPhone sales because it’s one of the last locations to ‘have its supply of iPhone devices normalize.’”

Read more in the full article here.

[Thanks to MacDailyNews Readers "Edward Weber" and "David E." for the heads up.]