I don't know, but they pulled it off. It helps that the young presenters are really good, while Fred's new role really works. The anorak elements as part of the set help too for older viewers.
This doesn't surprise me considering Nic Ayling's involvement. Interesting to see the original HOW theme used with titles featuring a vortex and therefore more familiar with How 2 viewers. The title sequence is essentially the HOW 2 titles seen through a HOW filter, if that makes sense.