DarrkPhoenix: Unless it's been shown that patches to strip out the DRM are completed and being held in escrow by a third-party, along with legal agreements in place to ensure that these patches are released regardless of the wishes of new owners, publishers, creditors, or court-appointed executors, then such statements don't count for much.
Acquisitions, mergers, and especially bankruptcies can be quite messy when it comes to prior customer agreements and services, and it's very difficult to make any sort of promise that can reliably withstand one of the aforementioned events. The folks at Steam may have every intention of making their best effort to ensure people still have access to their games if Steam goes under or changes ownership, but even their best effort would likely amount to very little in such an event.
This is basically the fatal flaw of any argument that Valve will ensure that Steam games will work even if/when Steam shuts down. Once a company files for bankruptcy, the management loses all control over the company and its assets. So even if their desire to make Steam games playable is genuine, it wouldn't matter as it would cease to be up to them.
Plus, considering its poor reputation, I wouldn't rely on statements from Steam's support staff. For all intents and purposes, the claim is still a total myth.