Excuse me, is this a bad time?

Happy Tuesday! Four day workweek this week -- yeah baby!

I recently read that right now is a bad time to query agents. Well, not bad perhaps, but not optimal either. The agent's post basically said that due to the heat and summer's winding down, they weren't as inclined to get cozy with a cup of tea and read (and respond to) our query letters.

Any thoughts on this? I am new to querying so any insights as to timing would be greatly appreciated. Like  all unpublished authors, I need all the help I can get!!!