You are correct! Item search will be the most accurate. Updates every 15 mins or so... (wonder if thats why it runs so slow. hahahahahaha) Most on-hand counts update somewhere between 5am and 6am everyday. so that it doesn't affect Pricing and Instocks....OH Counts DO update within approximately 15 Minutes in Item Search after being sold. This can vary, though. The Instocks Application takes counts everyday at 4AM.
This is information that is stated in MySupport/Instocks training. Now, as far as OH Counts when we look up other store's info, that I'm not sure.