I was pleased to see some extra interested in one of the concepts that I have enjoyed developing somewhat. The link:
I responded to an inquiry from the "Bridge Guys" recently, which you may find true:
If you notice, most of the examples are ones that feature a 5-4-3-1 shape with the four-card suit being higher ranking than the 3-card suit. (As a side note, this is also the precise pattern that is the best argument for occasional 1NT openings with a stiff, when the stiff is the Ace or King.)
With 4531 or 4513, you have (1) open 1H, (2) typically rebid the minor, and then (3) rebid/raise spades. This might also happen, in theory, as Responder, but NMF or XYZ usually is used instead.
With 4153, this could also develop (1D-1NT, 2C-2D, 2S...). In fact, spades could be the end contract (Responder maybe 4333).
With 1453, delayed canape very possible, as described.
With 3145, delayed canape is possible.
Beyond these, however, are two possible preempted second suit scenarios.
With 5314, for instance, you might start 1S, rebid 2H, and then bid 3C. Similarly, with 3514, the same sequence might occur. These would seem to be less frequent with 2/1 GF, but I have had these sequences with standard or other methods, especially as a solution for a high reverse problem, and especially if the first suit is lousy.
For example, consider a problem. You open 1S with Jxxxx-AKJ-x-AKxx, and partner rebids 2D (as a passed hand, perhaps, or playing Standard American). Rebidding 2H makes sense. If partner then bids 2S, rebidding 3C makes a lot of sense as showing four clubs (possibly only three hearts).
Assuming this sequence type, the "delayed canape" sequence may also, therefore, occur when the sequence has preempted (or preempted in potential) the four-card suit even if the four-card suit is below the long suit. The preemption might come from an actual call (2D preempting the ability to bid clubs at the same level), through an artificial call (2C as Drury preempting Opener's ability to rebid 2C, for instance), or through the rebid being an artificial call (2C old-school drury preempting the ability to bid 2D as a natural values call, for example).
In theory, then, "delayed canape" may have a lot more occurrences.