Yeah I think i've got 4 of the 6 Key Skills all at level 3. Most amusing is that I was forced to do a Numeracy Key Skill despite doing A-Level maths. Despite what you may have been told, having done both I can tell you that L3 Key Skill is nowhere near AS level standard. I'd say it's about the same level as the higher GCSE paper.

As you say, good GCSE's (and A levels) are the important things when it comes to applying for jobs.