Does async and await increase performance of an ASP.Net application

I recently read an article about c#-5 and new & nice asynchronous programming features . I see it works greate in windows application. The question came to me is if this feature can increase ASP.Net performance?

consider this two psudo code:

public T GetData()
{
    var d = GetSomeData();
    return d;
}

and

public async T GetData2()
{
    var d = await GetSomeData();   
    return d;
}

Has in an ASP.Net appication that two codes difference?

thanks