Sorry guys, but here is a video of a restaurant chef using olive oil to cook CTM!
;D
Yeah, but this appears to be an Indian chef in an America restaurant KP?! :

I have to say that the CTM looks very runny and not up to much either (IMHO)

Did you also notice how he seems to be using bottled garlic and ginger purees too?
HAVING SAID THAT:
I've done a little research and found some things about Olive Oil that suprised me (
http://en.wikipedia.org/wiki/Cooking_oil)

- It seems that Olive Oil actually has a higher smoke point (ranging from 207C for Extra Virgin to 242C for Extra Light) than clarified butter/ghee (190C)!

- Extra Light Olive Oil (242C) actually appears to have a higher smoke point than Canola Oil (238C)!

- The smoke point of Extra Light Olive Oil (242C) is almost as high as Sunflower Oil (246C)!

Therefore, I guess the main objection to using EXTRA LIGHT Olive Oil are its relatively high cost and distinctive smell and taste. If you can live with that, go for it, although any other highly refined (i.e. high smoke point and blander), unsaturated (i.e. healthier), cooking oils will also be options to consider (i.e. which may be cheaper and with a less distinctive taste and smell).
It seems to me that we should still avoid using the other types of Olive Oil because their smoke points (207 to 225C) are significantly lower than alternative oils (and they are still more expensive and with that distinctive taste and smell).
I also presume that ghee is used primarily for its flavour and NOT for its high smoke point (as I certainly previously thought!).

And, after all of that, I shall be sticking with cheap vegetable oil....as the BIRs do...using butter ghee on naans and as a late addition (for flavour) to CTMs, etc

Regards,