Cardiff boss Malky Mackay was determined not to make too much of his team's rise to the npower Championship summit following their 2-1 victory over Birmingham.
Craig Bellamy put Cardiff in front but Leroy Lita found a leveller in the 54th minute, before home captain Mark Hudson hit the winner, converting after a corner from Peter Whittingham.
Mackay said: "I was delighted tonight. I always knew it was always going to be a tough game for us. It's nice to be up there but it's about being consistent. There's a long way to go so nobody's getting carried away about being top of the table."
He felt his side could have taken tension out of the closing stages by putting away earlier chances.
"We should have been out of sight, we shouldn't have had to defend in the last five minutes," he said.
"There were four or five chances that flashed across their box that we should have dispatched, but overall I'm very happy."
Birmingham manager Lee Clark believed his team were unfortunate to leave Cardiff without any reward.
The former Huddersfield boss said: "The performance was there again today. The last two games I've seen bright signs - our performances have been good.
"We've come to two very tough places and been more in the game. We've handled the opposition very well and I certainly feel we should have got something from this game, which would have been two positive results.
"I think we deserved something from the game. I thought we played well and we just got a bit unlucky. The goals are disappointing from our point of view but I feel we deserved at least a point."