Alsas, I only have the Olympus E-PL5 rather than the OM-D, but the sensor and performance as you have noted separately are petty much identical.
I have the standard 14-42 and 40-150 Olympus lenses for the E-PL5 and concur with your general comments regarding performance. The results are very pleasing and nothing to criticize. As necessary I pop on my Nikkor lenses with an adapter to fill in the gaps or where I would prefer a fast prime (AF and MF).
Great work, keep it up. Your comparative evaluations provide a great apples to apples reference point for the photographer in the field needing to make a decision on what lens to consider.