.Net BinarySearch is fast, but can we make it faster?

The short answer is yes, up to 25%

We all know that in the .Net Framework, the BinarySearch is fast to search in List<>, but can we make it even faster?

The Question

We have a List with 1.000.000 numbers.
We create a function to see if a number exists in the collection

public bool ExistBinarySearch()
{
    return _numbers.BinarySearch(numberToSearch) >= 0;
}

The Faster Binary Search is

public bool ExistFasterBinarySearch()
{
    int low = 0;
    int high = _numbers.Count - 1;

    while (low <= high)
    {
        int mid = (low + high) / 2;
        if (_numbers[mid] == numberToSearch)
            return true;
        else if (_numbers[mid] < numberToSearch)
            low = mid + 1;
        else
            high = mid - 1;
    }
    return false;
}