"I suspect that those 1 million people were never potential Ubuntu customers. ;-)"
Every person not using Ubuntu is a potential Ubuntu user.
"And not all 1 million of those devices are galaxy nexus or jelly bean ones"
This concerns all ICS equipped phones too. The number of devices having at least ICS is groing fast as device are being upgraded (eg. Galaxy S2, Transformer TF300) or bought (eg. Galaxy Nexus, HTC OneX, S3 and so on). And it is going to go faster.
"I suspect that those 1 million people were never potential Ubuntu customers. ;-)"
Every person not using Ubuntu is a potential Ubuntu user.
"And not all 1 million of those devices are galaxy nexus or jelly bean ones"
This concerns all ICS equipped phones too. The number of devices having at least ICS is groing fast as device are being upgraded (eg. Galaxy S2, Transformer TF300) or bought (eg. Galaxy Nexus, HTC OneX, S3 and so on). And it is going to go faster.