I have has the same wear pattern on my m3. I have been running less pressure in the rears attempting to compensate. I even think the center tread measures taller than inside and outside with the outside showing the most wear.
I am still
Not sure myself if this is normal wear. These are also the contis on the ZCP.
My 335i wore heavily on the inside and I expected the same on the m3.
2011 E90 M3 Jet Black/Black
ZPP, ZCP, ZTP, ZCW, 6FL, PDC, shades, 6MT