Well, not really!
I just found an interesting website - I think that in most comparisons you only see 1/4 of the sensor, which makes the difference look bigger.
There is a common feeling that APSc is much bigger than m4/3, but, when you look at it like this:
Sensor Size Comparison
It shows that it's not that much of a big deal (mind you, other APSc sensors are a little larger than the Canon one).
If you think of this as equivalent print sizes for a given resolution, then one realises how small the difference really is.
all the best