The striker was snapped up by Jags boss Alan Archibald after leaving newly relegated Dundee at the end of the season as Thistle took the Dees' place in Scotland's top flight.
The Jags' superb performances en route to the First Division title convinced the 28-year-old to sign on the dotted line and he is delighted with the talent in the Firhill ranks.
He said: "I came and watched Thistle a few times last year and I was playing in the SPL last year so knew the standard and thought we could make a good start this season.
"I knew we were good, but I didn't realise how good. The first 45 minutes against St Mirren was probably the best I have ever been involved in.
"It was just waves of attack, it was excellent to be involved in.
"Some people would think that we are in a bubble because we have just came up and it is only five games. But I think the manner that we have played in the games proves how good we are.
"We have taken the game to teams and controlled games. I looked at the stats after the St Mirren game, they are a team that are supposed to pass the ball about and we had 65% possession.
"Not many teams go to St Mirren and have 65% possession. It shows you how much confidence and belief we have."
It has been a terrific start to the campaign for Archibald's side as they have taken eight points from their opening five SPFL Premiership fixtures, with their two wins coming on the road at Ross County and St Mirren.
Aberdeen visit Firhill this weekend as the domestic action gets underway once again and Baird is determined the Jags will pick up where they left off following their 2-1 win in Paisley last time out.
He said: "We need to try and keep it going all season. There are going to be times when it will be difficult but every team in the division will have that.
"We have got a great squad of players. If you look in the stand at the boys that are injured - Sean Welsh and Jordan McMillan - and the younger boys as well, there is a very good squad here. If someone drops out, it is like for like."