The reason we have ground connections as a requirement here in Canada is so that should something go wrong and your pool become "live" everything will be fine since it's all good and grounded - current (the thing that kills you) takes the path of least resistance - which will always be to ground, so if there's a direct way to ground with little resistance (grounding wire) it will not go through you the person being of a higher resistance.
Bonding just ties everything CONDUCTIVE together near a pool but does not provide a grounding point, so should your pump feed wires touch to the bond wire (I would use "short out" here, but the term only applies if a ground exists), everything else bonded within 5 feet of your pool will become live (IE: brought up to the same voltage level of your bonding wire - IE -potentially lethal) The current you will draw from these live components all depends on your ability to pass the current through you to ground - usually enough to harm you nicely - this is all done in attempt to keep the US Gene pool relatively clean.
A Master Electrician friend of mine cannot make sense of the US bonding system, he's tried to figure it out many times, and always comes back to the same conclusion, if your bond doesn't directly tie to a ground (specifically stated in the US electrical code that grounding a bond is a NO NO) it becomes a potentially lethal weapon and really has NO PURPOSE.
Kevin's setup is a grounded system.
Now, one thing that can be said about a bonding system is that in all likely hood, it is grounded as well, due to the fact that the pool and anything bonded is not suspended in thin air, rather, it's all sitting on the ground, making contact, therefore, essentially grounded - just not through a ground rod that pretty much guarantees a good connection by going deep and into wet (conductive) soil.
The concrete that the rebar is embedded in is also bonded (because concrete also has conductive capabilities) however, there is resistance in all this - something that is almost non existent in a grounded system. So if your personal resistance to pass current to ground is lower than any of the resistance found in the bonded components - you're the path of least resistance.