Search, Match IE Tab to get IWebBrowser2 - which of these is best & why?

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COM

IE8

automation

Problem - Launch a TAB in existing instance of IE and then obtain IWebBrowser2 ptr to this TAB
User - to Provide 'title' of the target page

Which of these is the fastest & reliable?

Code for launching TAB is not included here

Method 1 -

Using IShellWindow, get count of all windows and also obtain pIDispatch using Item() call 
For every shell window
    pIDispatch->QueryInterface (IID_IWebBrowser2,&pBrowser);
    pBrowser->get_HWND(&hwnd)
    // GetClassName & go ahead only for 'IEFrame' class
    // Wait for ready state - the most time consuming 
    pBrowser->get_Document (&pIDispDoc);
    // get HTML document title
    pIDispDoc->QueryInterface(IID_IHTMLDocument2,(void**)&pIHTMLDoc);
    pIHTMLDoc->get_title(&bstr)
    // compare title with expected title

Method 2 -

Using EnumWindows() go only for 'IEFrame' class
    for each 'IEFrame' use EnumChildWindow() and get 'Internet Explorer_Server' 
         finally for each 'Internet Explorer_Server'  get the window handle
         using this handle get title text 
            If this title matches expected title
                Pass 'WM_HTML_GETOBJECT' to get the IWebBrowser2

Method 3 -

Using IShellWindow get cnt of all windows and also obtain pIDispatch using Item() call 
For every shell window
    pIDispatch->QueryInterface (IID_IWebBrowser2,&pBrowser);
    pBrowser->get_HWND(&hwnd)
    // GetClassName & go ahead only for 'IEFrame' class
    (IWebBrowser2 ==> QueryInterface for IServiceProvider,
    IServiceProvider ==>QueryService for IOleWindow, IOleWindow ==> GetWindow)
    From window get the title 
    // compare title with expected title

Method 4 -

Monitor the 'NewProcess' for TAB creation using EventSink