Anyone have much feedback on the V/notch single tongue-n-groove method of splicing rafters together?

I just don't ever see these and was wondering about what the determining factor as to when to use this method, would be... The roof was an 10/12 pitch.

Normally, I would think that if this method were used, there would be a scab of OSB across at least one, and possibly both sides of the rafter lagged together across the splice.

Opinions welcome...

Rich

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"If con is the opposite of pro, is Congress the opposite of progress?"
Richard Rushing, HCRI
Duncanville, Tx.