The POW queue is currently 77 deep this means it takes ~80 minutes from the time you solve a POW until the time you get scheduled to produce a block.
What does it look like when you
1) Solve a block
2) Produce a block
Blocks are produced on a fixed schedule and must be signed by the private key that did the POW.
POW is a TRANSACTION that gets included by the currently scheduled block producer, the transaction adds you to the queue *IF* the POW is sufficient.
End result: 3 second confirmations (same as BitShares) and 100% predictability in block schedule and no orphan blocks, but you can have orphan POW TRANSACTIONS if they don't get to the scheduled block producer in time.
Block producers have more to gain by including your transaction than by ignoring it, they get paid to include your POW. You don't get paid for your POW. You only get paid when you eventually produce a block and/or include someone else POW.