I do the job of a senior engineer and yet am paid a bit less than what's listed for an entry level engineer. And I live an incredibly comfy life. What's the catch? Are these for more than 40 hours a week? Is silicon valley really that expensive? Or are they literally giving college grads enough money to retire by 35?
The cost of living is higher, but it's well under the increase in pay for being in the area. My current living situation is actually pretty cheap; I split a 4BR house, live 7 min from work, and pay $1650/mo for my portion of rent/utilities.
Most people I know tend to get 2BR apartments and split it with someone, usually paying $2000-2500/mo.