Test the system before you restore the service
I'd rather they took there time, tested it and got it right.
Modern IT management demands that you get it working as fast as possible, which as a rule means that you cut out testing THE MOST IMPORTANT BIT!!!!
I've seen management cut the testing part of the project so that they can meet their deadlines and the resulting mess when it corrupts live data :(
Alan Turing proved with the halting problem that you cannot know if code does what it should without putting data through it (even if you analyse it in your head you still do a dry run).
Carrying out good system tests takes more time than writing the code, as each time you find and fix a bug you should run all the system tests again (to check your fix hasn't introduced another potentially nastier bug).
The Reg seems to be pushing the modern management mantra here that it must be up and running immediately and sacking "the blockers" who advise that the job should be done properly (which is probably why your in the hole in the first place).
If you look at how they are bringing parts of system it looks from the outside that they are testing it first before going live, good to see a big company doing things the right way for once!!