"By comparison, the number of jobs at a typical data center can be anywhere between five and 30."
Although they do not create as many permanent jobs as other types of projects, capital investment in data centers can be quite substantial, justifying large incentives offerings.
www.areadevelopment.com
Lets be generous, and say it will be a few hundred. This is a a small benefit. Unless its something, such as call centre as well, or a HQ datacentre.
And lets not forget who is making the claim: Northumbria Council, who were taken in by a few chancers to build a giga factory.
It may employ many people to set up of course.