Yes, unless you are using a custom profile the native Epson driver does indeed
expect you to be in sRGB.
>> AFAIK this is normal. The gamuts of the colour spaces are
>> different. But it leads me to wonder - if some of the
>> problems I've had with colour matching between the screen
>> and the output on an Epson printer is that the printer
>> driver expects the user to be viewing an image in sRGB
>> not in Adobe RGB?
Epson Inkjet Printer FAQ: http://welcome.to/epson-inkjet