Yes power backs are common currency at the likes of ABZ. Larger Props get pushed by a tug as do Jets. As previously mentioned the Air Florida crash is a prime reason that aircraft with underslung engines do not power back as there is far too great a risk of FOD ingestion. The same is applied these days to the MD series in the US.

As for the picture, we have a mix of speedbrakes and ground spoilers. On Boeing's you can differentiate the Ground spoilers as they deflect to a greater angle than their airborne used counterparts the roll spoiler/speed brake. Generally the inboard ones are for ground use only. The outer most for roll assistance and drag.
We tend to use reverse idle when we can, reducing noise and fuel burn by simply allowing the reverser doors or 'translation sleeves' to deploy. This redirects the bypass air forward through cascade vanes. We tend to remain at reverse idle until at taxi speed/vacating the runway to reduce brake temps. In conditions where snow or some such oddity that perplexes the UK appears or has been laid, we tend to stow the reverser doors/sleeves early to avoid ingesting too much.

And yes it is the pitch angle on variable pitch propellers that enables the little puddle jumper to make a racket, rattle ones fillings, and commit to motion in the reverse. Noisy blighters