NO.
http://www.kurzweilai.net/articles/art0134.html?printable=1
excerpt…
This is the view behind SETI, was my view until recently, and is the common informed view today. Although SETI has not yet looked everywhere, it has already covered a substantial portion of the Universe.
Chart by Scientific American
In the above diagram (courtesy of Scientific American), we can see that SETI has already thoroughly searched all star systems within 107 light-years from Earth for alien civilizations capable (and willing) to transmit at a power of at least 1025 watts, a so-called Type II civilization (and all star systems within 106 light-years for transmission of at least 1018 watts, and so on). No sign of intelligence has been found as of yet.
In a recent email to my research assistant, Dr. Seth Shostak of the SETI Institute points out that a new comprehensive targeted search, called Project Phoenix, which has up to 100 times the sensitivity and covers a greater range of the radio dial as compared to previous searches, has only been applied thus far to 500 star systems, which is, of course only a minute fraction of the half trillion star systems in just our own galaxy.
However, according to my model, once a civilization achieves our own level (“Earth-level”) of radio transmission, it takes no more than one century, two at the most, to achieve what SETI calls a Type II civilization. If the assumption that there are at least millions of radio capable civilizations out there, and that these civilizations are spread out over millions (indeed billions) of years of development, then surely there ought to be millions that have achieved Type II status.
Incidentally, this is not an argument against the SETI project, which in my view should have the highest possible priority because the negative finding is no less significant than a positive result.
It is odd that we find the cosmos so silent. Where is everybody? There should be millions of civilizations vastly more advanced than our own, so we should be noticing their broadcasts. A sufficiently advanced civilization would not be likely to restrict its broadcasts to subtle signals on obscure frequencies. Why are they so silent, and so shy?