As far as I know, number of mining turrets used does NOT affect the mining speed; Aeternus Doleo (who was responsible for the mining system) clearly told that this is not encoded into the mining part of the mod. Higher drops might be explained by lucky random drops. I made several tries when I discussed this with him, and I found the difference is 15-20% between 1 turret and 2 or 4 turrets (Hegemon). I admit there is a difference for sure, but the drop rate is certainly not multiplied by the number of turrets used, as stated in the post of Vulkhard Muller.
Other thing: right now, the premium scrap drop rate is almost similar (maybe a little bit higher) to the drop rate of other ores in normal fields (silver/copper in O7 for example). It was much higher before the field depletion was still in effect, but since it was turned off, it was nerfed down to normal drop rate along with regular scrap. The Wiki is certainly outdated on Premium Scrap drop rates.
So, to summarize, the only advantage of premium scrap that it can be shipped right away with the mining ship in larger quantities, but that stands only for Junkers (Salvager) and ALG (Golem).
As others stated, I really think lawful sellpoints should be boosted, so ALG/DSE/etc could also haul it.
![[Image: 2whqqh0.png]](http://i41.tinypic.com/2whqqh0.png)