I agree. I would rather invest in a startup run by a 30+ person than one run by two 20 somethings. I think one problem of starting up at 30+ is that one has achieved already a level of income, status etc. Putting that to risk is not so easy step to take than just having graduated. But if such a person takes that risk her idea is probably worth a second look...

What about the fact that when an industry matures it tends to become an oligopoly. It almost happens with any industry in history (e.g. automotive). With maturity often comes standardization which in turn compliments big bureaucratic organizations.Will this also apply to the Web? What about the chances of startups in the automotive industry? They used to be good round 1900... Some thoughts on costs: While it is cheap to get some system up and running in a world of lots of different apps and competitors that go after a limited number of users it will be vital to get attention in order to succeed. In the end this probably means spending loads of marketing money which is anything but not cheap.