Might I suggest the following?
I agree that the acid test of bespoke is the presense or absense of a completely individualized paper pattern, which is drawn from scratch. However, there is really more to it than that. Just going off an individually drawn pattern is no guarantee of getting a perfect suit. But more fundamentally, the individual pattern is not the end; it is a means to an end. The end is a perfectly fitting suit that realizes exactly what the customer wants, that replicates in every respect what he saw in his mind's eye when he placed his order.*
Bespoke tailors thus draft individual patterns as a means of achieving this end, not the other way around. There are also other things they do to achieve this end, things that many of them think are equally important. Such as: they measure and observe the client themselves. The measuring tailor also drafts the pattern, cuts the suit, AND does the fittings. He carefully supervises all work, even if he does not sew every stitch himself. He conducts as many fittings as necessary and does not employ a system (e.g., sending stuff to factories far away) that make fittings at best impractical.
If you ask a bespoke tailor what is required to call a suit "bespoke" he will mention the individual pattern, but in all liklihood he will mention the above considerations as well. He may even deny that a suit made from an individual pattern, but lacking in these other criteria, is truly bespoke. The reason is, again, simple. An individual pattern is only one means -- a necessary but insufficient means -- of producing a perfectly fitting and totally unique and individualized garment. The other steps are also necessary. In fact, without those other steps, one can make a case that the effort of drafting an individual pattern is wasted. One never knows how such a pattern will perform on a client until and unless one sees it on that client. Adjustments are inevitable. Fittings are necessary. Arguably, MTM patterns are safer and more likely to yield a decent no-fitting suit, because MTM block pattern systems are drawn with great care to work on many different body shapes.
Also: the more control the tailor has over the process, the more individualized (and individualizible) your suit will be. Anything made far away, in a factory, is going to be somewhat standardized by necessity. Tailors who consider themselves truly bench-bespoke makers insist on controlling the majority of the process themselves because they want to be able to make any changes they think are necessary, and any that the customer wants. For example: say you are big and tall, and you therefore prefer a wider pocket flap and breast welt pocket. Well, you can still get a suit made from an individually drafted pattern in which that is not a practical option. A CMT factory will in all liklihood not be equipped or willing to shut down production to change their pocket flap draft just for one suit for you. But a true, local bespoke tailor can and will.
Finally, this has been posted here before, but it bears repeating: no pattern is truly individualized and bespoke in the strict sense unless it is drawn by someone who has actually seen you. Numbers are not enough. Posture and shape matter.
* I realize that not every bespoke customer is so exacting or has a totally clear and detailed idea of what he wants. But the principle remains the same: with bespoke, everything -- every possible change, alteration, modification, or option -- should be on the table.