The R's are currently in second place in the Championship table after seven wins and two draws from their opening nine matches.
Simpson and his teammates picked up their latest victory on Saturday thanks to a 2-0 triumph over Middlesbrough at Loftus Road.
"Even though we're unbeaten, we've not really been at our best, but I think we showed what we're all about against Boro," Simpson told the club's official website.
"Some of the one and two-touch football in the middle of the park was fantastic at times. I thought we clicked into gear on Saturday."
QPR continue their bid for promotion on Saturday when they entertain bottom-placed Barnsley.