Daniel,
I think we're at cross purposes and you've possibly misunderstood much of what I was trying to say. As I'm not too good withthe quote thingy and don't know how to quote in sections and answer please forgive me for doing it this way...
"Firstly, here you are confusing bokeh with depth of field. Bokeh is a specific quality of how out of focus detail and highlights are rendered. It is a fixed characteristic of a lens. You do concede that later on, but only after describing techniques to change depth of field in the context of changing bokeh."
There's no confusion, I know the difference and I did actually say that bokeh is down to the lens
"Secondly, in some situations you are restricted in how much you can manipulate aperture and focussing distance/background distance in order to get your required depth of field. Smaller sensors are very limiting in this way."
I know this and I did say that you have to work with it
"Again this is wrong. The lower pixel densities of FF frame sensors over their smaller counter parts afford many benefits in terms of IQ. There are also benefits offered by the high resolution of the 5DmkII. The avoidance of very wide lenses in order to get the same FoV also helps improve IQ."
What I actually said is that in my opinion unless you look very closely there's very little difference, except in high ISO performance and I also mentioned cropping and printing or viewing BIG. I can accept that you think otherwise and I'm quite sure that you can accept that for me in anything other than higher ISO situations I think that there's little significant difference, for me
"Yes a 5D will
appear to make shallow DoF easier and that is because it can
physically achieve a lower depth of field for a given scenario.
If the OP (or anyone else for that matter) defines better as having more control over DoF than yes, you will get technically better shots with a larger sensor."
Under the strict definition of "better" being having more control over DoF I'd agree that full frame could give more options in some situations but conversely there are situations or shots in which MFT, for example, will give you a shot that'll look like it has less DoF than a full frame image

I think that generally although the images from different formats will be different it's up to the individual to decide if they are actually better
"Your argument is a bit like saying you might as well buy a compact camera and decrease your distance from the subject relative to the background for all the benefit a full frame dSLR will give you. In the real world, unless you have full control of the situation, it just doesn't work like that."
Nope, that's not what I said or what I meant, at all, please see my closing comments
"I've used 1.0x crop, 1.5x crop and 2.0x crop extensively. The crop factor does have it's uses - 1.5x crop is perfect for my sports and product photography and in studio conditions, the image quality is comparable to what I'm getting at 1.0x crop. At a wedding in dubious lighting? Shooting a landscape shot? The 1.0x crop demonstrates a significant improvement."
No need for me to comment, it's a personal thing.
"2.0x crop is a headache for distortion. Great for candid work and documenting travel, but I wouldn't bother for any other regular commercial application."
I don't get any significant distortion but I do agree with your other points.
My general point was that for me other than higher ISO usage I find IQ differences between MFT, APS-C and full frame to be generally insignificant. Images from the different formats may well look different, but IMVHO that doesn't necessarily make them better :thumbsdown:
Others are free to disagree and most probably will
