With the Villans making the trip to the Emirates Stadium this afternoon, Vermaelen said that he is happy to see the Scottish coach being given time to get things right at Villa Park.
"I'm surprised they have struggled this season," Vermaelen told Arsenal's matchday programme. "I've watched them several times and have seen them put in some really good performances, scoring some nice goals.
"They've gone with a young team and I think that's been the difference this year. What pleases me about them is that their manager, Paul Lambert, has been given time.
"He has a fairly inexperienced team and it's refreshing to see that he has been allowed to work with the players, developing them, rather than having to look only at the short term. Other clubs have sacked their managers very quickly and I'm glad Villa have not."
The two teams drew 0-0 at Villa Park in November.