tedster - 6:59 pm on Jul 16, 2010 (gmt 0)
Yes - because these are very widely known factors that have been in play for years, and Google has moved far, far beyond this kind of information retrieval. To get a taste for what else may be in play and simply swamping out the new signals you were introducing, you can read some of the Google patents we've discussed here, especially:
Historical Data [webmasterworld.com]
Phrase-Based Indexing [webmasterworld.com]
The Phrase-Based Indexing patents (I believe there are now 8 of them) will give you a picture of how much things have changed since the text-match days that have gone by.