12 blasts shouldn't get you 48 hits against a competent opponent spreading out their force, let alone wounds. So I'm glad for you that your opponent bunched up his/her squads, but I don't think you can rely on getting so many every time. I can usually only place a small blast for 2 or 3 hits, and on rare occasions scatter for 4.
...still, you've piqued my interest. I'm marginally more excited to get the codex, now (not that I wasn't before--but a favorable report sure doesn't hurt my hopes).
What sphinx of plascrete and adamantium bashed open their skulls and ate up their brains and imagination? Imperator! Imperator!