When I had to extract data, there was no easy way - at least I didn't find any. This little VBScript routine saved the day. I had to take short cuts to save time (to avoid all the authentication issues, I first open the site in IE and then run this. It does not use the same instance but new instance already have access to the site. And gave a 4 second sleep to complete the page load instead of waiting for an event).
Note that ~ is used as the delimiter to allow commas in data and non-breakable spaces in the table are replaced by regular spaces.
set FSO = CreateObject("Scripting.FileSystemObject")
Set IE = WScript.CreateObject("InternetExplorer.Application", "IE_")
IE.Visible = True
recIndex=1
set outFile = FSO.CreateTextFile(".\outfile.csv")
IE.Navigate "https://sites.google.com/site/<mysite/mypage>"
wscript.sleep 4000
tmpSTR = IE.Document.DocumentElement.innerhtml
set objTable = IE.Document.GetElementByID("goog-ws-list-table")
set colRow = objTable.GetElementsByTagName("tr")
For each objRow in colRow
set colFields = objRow.GetElementsByTagName("TD")
If Not isnull(colFields) then recIndex = recIndex + 1
outfile.Write recIndex
For each objField in colFields
outfile.Write "~ " & trim(replace(objField.InnerHTML," ",chr(32),1,-1))
Next
outFile.Writeline
Next
outfile.Close
MsgBox "Done"


