I didn't see anything that said they were operating under a different name - only the interior decor was different and they abstained from putting the logo outside.
Apparently the experiment isn’t working. A former Starbucks insider said that Seattle’s 15th Ave. Coffee and Tea – the first of the new not Starbucks stores (its website, by the way, is called www.streetlevelcoffee.com) – is doing only a third of the business of the regular green-logoed Starbucks store that used be at that site.