The problem is TF2, Aooga. I'm convinced, or some interaction with that program. I get 100 ping or so on a regular basis, and it's fine - almost no stutters. I used to have problems in CS:S that persisted despite completely blowing away Steam and reinstalling everything. It turned out that my video drivers were old, my disk needed (badly) a defrag, and my router needed to be rebooted. Once I did those things, CS:S was fine.
I suspect you have a myriad of small things that are making this an unpleasant experience for you. It may even be something as simple as a corrupted texture file or something similar.
You've told me that CS:S is fine on your computer. No problems. The next step is to try TF2 on servers that report similar ping times, and see if you have the same problems.
After that, blow Steam away (including deleting the c:\program files\steam directory) and reinstall it (which will take a long time, I know). That could be the magic ticket.
Of course, it might not, so ... be careful no matter what you do.