We're getting around the same rate of inquiries coming in for solar PV as we did in the summer of 2011, just a lot more of them are commercial, and the main motivating factor is energy saving.
There was apparently 0.5GWp of solar installed in the last quarter, mostly in the solar farms segments, but there's every indication that there is a lot of pent up solar demand out there, and IMO the floodgates will open on that demand once this autumns electricity price rises are announced in the Autumn, and hit the bills next winter / spring.
There is also more interest in renewable heat filtering in, seemingly despite the RHI debacle, plus insulation work etc with or without green deal now that the free insulation stuff has dried up.
We just need a decent summer now and things should be looking up, particularly IF they actually do announce the RHI rates in the summer, which should then see a surge in demand for renewable heat prior to the autumn.
Effectively IMO green deal is just a finance method which may be suitable for a proportion of the population, but the demand is there regardless of it for effective energy saving measures that will pay for themselves in a reasonable timescale, and this demand will only increase with the energy price rises built in for later this year.