I'm running a 920 at 4.0 GHz and I peak under an 8 thead small FTT prime 95 load at just about 70 or 71 with a TRUE. But there are always differences between someone else's setup and yours.
For starters, I decided to lap my TRUE right out of the box after checking the contact with the CPU (which was not very good at all). Unfortunately, this means I don't have any reference temps for unlapped. You can find some tests around online with lapped vs unlapped though. Some report very nice improvements of ~5C, other report basically no improvement. YMMV, but I'm convinced that my lapping helped.
Also, my ambient temperature is about 72-73F. If yours is higher, you will have higher temps. It is also important to note that my ambient stays at this temperature even during extended periods of extreme CPU load. Lots of people will having rising ambient temps in their room the longer they run a stress test, sometimes just a little, sometimes very pronounced. If this is the case for you, it's something to take into account (and maybe improve, if possible).
Check your case to make sure you have a good amount of fresh air reaching your heatsink, and that the air leaving the heatsink is exhausted fairly quickly. In my case I have my TRUE mounted vertically, with my fan pushing air into the heatsink towards the back of the case, right into the waiting arms of my exhaust fan a couple of inches away, so very little of the heated air stays in the case during heavy loads. For reference, the case is a CM ATCS 840 with a 240mm intake up front, a 120mm intake on the bottom, a 120mm exhaust on the back, and two 240mm fans up top, the back one is running exhaust, the front one I have off at the time being and may switch it to intake in the future, because having both of them exhaust was stealing my fresh air from my CPU.
You may consider the washer mod or penny mod, which could lower your temps a bit. The implementation varies, but the basic idea is to get the TRUE seated with more pressure on the heatsink, since the pressure is a bit low stock. I have not done this on mine because I've been happy with the temps so far.
Of course, if you are not very concerned about noise, you can just slap a faster fan on that sucker and lower temps too. If noise IS an issue, you can pick up a slightly higher CFM fan at the same noise levels. I use
this Noiseblocker, which is rated about 10CFM higher and 1db lower, which I would agree with after testing them both out.
This is all food for thought if you want to try lowering your temperatures. If, on the other hand, you are happy with your current overclock, those temps are fine, as you will basically never have that much load on your CPU in real world use, as you've noted.