As we noted lat time round it's not a surprise to see Windows Phone doing well in these test:
A well trained member of the Windows Phone team up against a member of the public is hardly a fair comparison. But, the "challenge" tasks are the sort of things that people will do with their phone, and the people involved are genuine.
More importantly, it shows how Microsoft is positioning Windows Phone when presenting the platform to the public. The underlying idea is of a device that matches to the way you want to do things, and is personal to you.
On the other hand, the numbers shared in the blog post, albeit without any context on survey methodology, do suggest the campaign is being well received and is changing consumer perceptions of the platform. Getting that to scale, and converting perception or intent into actual purchases remains a significant challenge, each step of the process is important.
Here's an example video from the Meet Your Match challenge. You can watch the rest of this YouTube playlist.