Yes and no. I would separate two things.
Yes, there has been, not just amongst the Five Eyes, but across, if I'm not mistaken.... We did a study for the strategic balance for the IISS, and about 90 countries are starting to develop the equivalent of what would be a cyber command, which means a military organization that effectively looks at cyberspace as a domain for operations and that trains, equips, and develops a doctrine for being able to conduct operations therein. Clearly that's happening in other Five Eyes countries.
However, within the U.K. and the U.S., you've also seen coordination amongst the civilian agencies, such as Homeland Security, for example, and the critical infrastructure protection office in the U.K., which have taken capabilities from GCHQ and NSA and moved them into civilian agencies that have responsibility for critical infrastructure, the financial sector, the energy sector, etc.