Xbox 360 Slim on the way? Steve Balmer talk

[i love xbox360]

Ldn.se said:
If they would want to release 360Slim in autumn, they should have a prototype by now. It would be very risky to sell a product without testing it for long enough to make sure is 100% reliable.

what product will ever be 100% reliable? even the mighty wii is not 100% reliable