Jakob Neilsen:
Increasingly, the Internet user experience is becoming one of dipping a toe into websites rather than truly “visiting” them. Using search engines as their Web interface, people simply grab query-related nuggets from sites, but don’t engage with the sites themselves. [When Search Engines Become Answer Engines (Jakob Nielsen’s Alertbox)]
The web search engine as entry point is an increasingly important factor as we think about library information systems.