Yahoo has gradually been getting better, but is still abysmal. The most recent ratios:

Google 4025
Yahoo 270
MSN Search 125
AOL Search 65
Google.fr 62
AltaVista 16
AllTheWeb 7
Teoma 5
iWon 2
Overture 2
Lycos 1
ixQuick 1
Excite 1

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...the Rockies may tumble, Gibralter may crumble... G & I Gershwin, 1937