Statement:
An average person in Iceland drinks less alcohol than in Grenada

In the Alcohol average daily consumption rating Iceland holds position #109 ²⁰¹⁶ out of 189 and Grenada is #51 out of 189 ²⁰¹⁶.
Position of Iceland is better than position of Grenada.
Both countries holds average positions in the "Alcohol average daily consumption" rating. So Both sexes is an average for both Iceland and Grenada, compared to most countries of the World.

Referencies:

1. Alcohol average daily consumption ²⁰¹⁶ by WHO

   The countries in the rating sorted by 'Both sexes' in descending order.

   Grenada	'Both sexes' value is	40.4
   Iceland	'Both sexes' value is	27.6