Always late to the party! 
There are some very impressive images posted to this thread.
Here are a few of mine captured with the 100-400mm -- both version 1 & 2, as noted in the Exif.
Greg

#1
E-M1X OLYMPUS M.100-400mm F5.0-6.3 lens 138mm f/5.6 1/2000s 400 ISO -0.7 EV

#2
OM-1 OLYMPUS M.100-400mm F5.0-6.3 lens 210mm f/6.3 1/400s 1600 ISO -0.3 EV

#3
OM-1 OLYMPUS M.100-400mm F5.0-6.3 lens 400mm f/8.0 1/1000s 200 ISO -1.0 EV

#4
OM-1 OLYMPUS M.100-400mm F5.0-6.3 lens 400mm f/6.3 1/4000s 5000 ISO -0.3 EV

#5
E-M1X OLYMPUS M.100-400mm F5.0-6.3 lens 285mm f/7.1 1/4000s 500 ISO -0.7 EV

#6
E-M1X OLYMPUS M.100-400mm F5.0-6.3 lens 169mm f/6.3 1/3200s 800 ISO 0.0 EV

#7
OM-1MarkII OM 100-400mm F5.0-6.3 lens 400mm f/6.3 1/1600s 1600 ISO -0.3 EV

#8
OM-1 OLYMPUS M.100-400mm F5.0-6.3 lens 200mm f/5.9 1/3200s 1250 ISO +1.0 EV

#9
OM-1MarkII OM 100-400mm F5.0-6.3 lens 227mm f/6.3 1/3200s 1600 ISO -0.3 EV

#10
OM-1MarkII OM 100-400mm F5.0-6.3 lens 186mm f/5.9 1/25s 800 ISO -0.3 EV

#11
OM-1 OLYMPUS M.100-400mm F5.0-6.3 lens 300mm f/6.3 1/640s 1600 ISO +0.3 EV

#12
OM-1MarkII OM 100-400mm F5.0-6.3 II lens 236mm f/6.1 1/30s 12800 ISO 0.0 EV