IronPython faster than CPython?

[Jack]

I learned a lot from the other thread 'Is a "real" C-Python possible?' about 
Python performance and optimization. I'm almost convinced that Python's 
performance is pretty good for this dynamic language although there are 
areas to improve, until I read some articles that say IronPython is a few 
times faster. I find it amazing that something that's written in C and runs 
on hardware is slower than a .NET app that runs on CLR as managed code:

http://www.python.org/~jeremy/weblog/031209a.html
http://blogs.msdn.com/jasonmatusow/archive/2005/03/28/402940.aspx