Mobile Payments - Are they Secure?

Here's a stat that some of you might be interested in. The annoying thing is that I can't remember were I read it. If anyone knows, please feel free to comment on this article and let people know. So here goes:

'The average time it takes before a person realises they have lost their mobile is around 25 minutes compared to the average time it takes for a person to realise they have lost their wallet which is around 1 day'

Interesting. Plus add onto this that all payment transactions can be validated through a user name/password mechanic and over https as per a user's experience on the web, I am definitely sitting in the 'secure' camp.