Roughly ten days after it last updated iPad mini ship times, Apple has dropped the wait again -- indicating that availability is improving. While still not achieving what CEO Tim Cook calls "supply/demand balance" (which generally translates into a shipping status of "in stock" or available for immediate shipping), the delay has now dropped to 1-3 business days in the US and Canadian stores, down from the 3-5 day delay recently advertised. The iPad mini has been heavily in-demand since release, and in-store supplies are still constrained.