Statistics from Chitika Insights suggest that the iOS slate accounts for 78.9% of all internet traffic in the tablet sector, down from 86% before Christmas.
Strong sales of rival devices such as the Kindle Fire, Samsung's Galaxy range and Google Nexus hardware during the festive period appears to be behind the iPad's slump.
The Kindle Fire's web share rose by 3.03% during the period in question, while Galaxy tablets increased by 1.38% and Nexus devices by 0.92%.
However, the report predicted that the iPad will regain some of its web share as users return from their Christmas holidays and surf the web less frequently with their new devices.
"Despite the gains by competitors, we expect that the iPad's share of tablet traffic will return to the 80% range, albeit lower than pre-holiday levels as users return from vacation and browse with their new devices less frequently," Chitika stated.
Although iPad web traffic slumped during the festive period, the iPhone 5 saw gains of 1.11%, slightly higher than the rivalling Samsung Galaxy S3's 1% increase.
Watch Digital Spy's video review of the iPad mini below: