Ars Technica reports on some homegrown research about the MacBook Air.

When the MacBook Air was released in January this year it was widely considered to be a very niche product and likely to head down the same road as the Cube. But Ars’ investigations show that initial sales of the Air are very promising.

The site first quotes that the online Apple store in some markets is predicting 5-7 business days for MacBook Air deliveries; Amazon is also reporting to be shipping orders on or after March 16th.

One Best Buy source told the site that stock has been pretty thin.

Moving onto brick and mortar stores, the site found out that Apple stores around Boston garnered a motto over the weekend: “no Air for you.”

Apple Stores in Cambridgeside, North Shore, Burlington and Natick were completely out of stock with employees from some stores stating that demand has been “extremely high” with some customers paying extra for the SSD model which remains in stock at most locations.

Reports from flagship stores in San Francisco, New York, Chicago and Los Angeles state that the Air is out of stock but is coming in on a daily basis.

Even at the flagship store on Regents Street, London stock is said to be selling out the moment it is in.

Apple is currently offering a MacBook Air stock checker for Apple Stores across America for those not willing to take a chance of just turning up at their local store.