Re: I'd never use them...
Now I'm not an IT expert but how long is the shut - down going to be? It seems to be taking a long time to carry out the audit and remove the vulnerabilities; the time being taken suggests that things are bad indeed.
Depends on the size of the audit doesn't it, given that TalkTalk is rather big (I think about 4m customers they've said this morning?) and their website doesn't look simple. I think any technology organisation with thousands of employees is likely to have rather complex systems. Plus if code needs rewriting then that isn't trivial if that code has to scale to hundreds of thousands of complex transactions.
Interestingly it looks like part of the "my account" systems are back on-line.