The Jags continued their remarkable run of form in the SPFL Premiership with a superb 2-1 win over St Mirren on Saturday and are a lofty fourth in the standings after the opening five games this term.
Victory in Paisley was Thistle's second on the road already following their terrific 3-1 triumph over Ross County last month, with their only defeat of the campaign coming at Motherwell.
Firhill draws with Dundee United and Hearts could easily have yielded further points for the top-flight newcomers and Archibald, whose side are not back in action until they host Aberdeen on September 14, has hailed his side for their storming start.
He said: "We are delighted, absolutely delighted. That is two away wins, the only way we could have bettered it is by getting a home win, which would have been nice.
"We are absolutely delighted with the reaction of the players and the way they have gone about their business in the first five games. To be sitting in the top half of the league, we are more than happy."
After slipping to a 1-0 defeat at Fir Park 10 days ago, the signs were looking ominous for Thistle on Saturday after Kenny McLean put St Mirren ahead just after the break.
A late rally secured all three points for the Jags, however, with excellent strikes from Kallum Higginbotham and Ross Forbes turning the match on its head in the final 10 minutes.
Only Motherwell, champions Celtic and in-form league leaders Inverness Caley Thistle are above Archibald's side in the standings and the Firhill boss was full of praise for his battling stars.
He said: "It was a fantastic comeback. I am absolutely delighted. We turned it around after going a goal down and I thought we had the better of the play at the time.
"It was interesting to see how they reacted but they reacted fantastically well. I am delighted to get the three points.
"My worry was that when St Mirren got their goal it would turn out to be a hard luck story for us. It was worrying but I told them to just keep doing what they were doing.
"I didn't want them to go back to front, I wanted them to keep trying to pass the ball and I thought they did that and they got their just rewards."
WHILE Thistle have enjoyed a memorable few weeks in Scotland's top flight, it has been a nightmare start for beleaguered Buddies boss Danny Lennon.
St Mirren have taken just one point from their four fixtures so far and crashed out of the League Cup to Queen of the South last midweek but Archibald has sympathy for the under-fire Paisley gaffer.
He said: "Danny is a former team-mate of mine and he is now a fellow manager. Of course you have sympathy. I think it is a bit harsh the pressure that he is under.
"We are only five games in, there are 33 games to go in the league season. I know fans want results straight away but in football you need patience. He has brought some players in and they need time to gel."
Thistle match-winner Forbes added: "It was a deserved win and we dominated. They defended quite well but we had chances we didn't take.
"The boys believe we deserve to be here and we always had faith the goal would come.
"Our main aim is survival and we want points on the board early to give ourselves the best chance. We didn't let our heads go down at 1-0."