13" rMBP had my first trackpad freeze today after having it for about a week using it for many hours daily. I did what someone suggested and it worked. I just closed the lid, took a phone call, when the phone call was done I raised the lid and went right back to work as it was no longer froze up. I just do not believe this issue is hardware related, because you have folks with older machines that have performed perfectly until Mavericks was installed. I know its frustrating, but Apple will resolve this.
I've actually been looking for an excuse to return mine as I have a 2009 MBP that has worked flawlessly since day one and it has 256gb SSD and 8GB of ram just like my new rMBP does. Just hated spending the money, but wanted the better display.
I honestly couldn't be happier!
Mine has had 2 freezes in 1 week. Not a big issue at present, and love the machine.
HOWEVER, I am scared about having to give a keynote or powerpoint presentation with this machine to a big audience. A freeze would be both embarrassing and extremely frustrating. The solution you mention, works, but is not a good solution for those that rely on their machines to perform when it needs to.