Why is that important? Scott will have a much easier time attracting visitors to his network of sites and his lifetime marketing costs will be lower because the domain names are memorable and have huge search counts. Scott owns the land on the Las Vegas strip. IAC has a few properties on the strip but mainly makes its living down by the Palms and the Rio Suites.
Take Scott's newly launched mashup at Joke.com (slow it's beta). The name gets ton of type-in traffic with no content and was simply parked for years. Activate the website as he has done by pulling funny video feeds from Youtube and the name's potential gets unlocked and begins to blossom.
The Web's biggest developers are generic name domainers. The rest of the world just hasn't gotten that yet.. they will. Development is happening all around us.. and it will intensify this year and beyond.