Is it really eating away at EE or is it just a huge growth in support questions for Rails, iPhone, CSS, jquery that SO has an advantage in? The top search term

Is it really eating away at EE or is it just a huge growth in support questions for Rails, iPhone, CSS, jquery that SO has an advantage in? The top search term for EE is Microsoft Outlook, while the top (non brand) search term for SO is "from_tag rails." Seems like search demographics are a huge part of the relative growth differences.