A friend recently introduced me to this language. From the definition, ObjC may come to mind, and it is pretty similar to ObjC in many ways, most notably the fact that it supports OO. Although this isn't the only difference between CTalk and ObjC, I find that CTalk's syntax is far more attractive than that of ObjC. I suggest you check out this language. As far as speed and any available benchmarks (if any) goes, I wouldn't make that a concern right now. I suggest you check out the language, it looks like it could be pretty handy.
P.S. It seems like it would be a good guess to say that the "Talk" in "CTalk" is taken from Smalltalk. 8)
LOLCODE anyone?