I am both a fan and a big supporter of TAR, but I think a month wait for some DVDs is excessive. I wish them nothing but the best, but if any business doesn't deliver to their customers in an acceptable time frame, then they won't last long. That's just how the market works. I certainly hope things improve because I want them to succeed.
Having said that though, if they now have a 4-6 week eta posted on their web site, then I guess you knew what to expect before you placed your order. This post would be appropriate after the 6 week mark, but not before. Like it or not, they did try to set the correct expectations.
BTW, I think there is a 30 day limit on revoking payment or filing a dispute with PayPal. If you ordered on Aug 3, then your 30 days may be up today. I have no doubt that your order will eventually be filled, but if you want a safety net, you might consider revoking your payment and re-ordering to start your 30 day count again. That's up to you.