As I posted a few weeks back I had to wait between 15  and 45 minutes for a taxi twice a day for a week in January when I was in Anchorage for medical services. My location was always in the core area and not on the outskirts. I could watch  multiple empty  taxis passing by my location on C street while I waited for one to arrive.  The excuse for the delay from the drives was always: they were busy and the delay was normal in Anchorage during the day.  That indicates to me there are not enough cab available to fill the demand.