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Wow... You actually changed the flow pattern a lot by doing that simple modification (just by inspection). You no longer have turbulent flow right at the entrance into the throttle body which is why you feel more power.
Having that sudden bend is better than stock as it reduces turbulence from the flow hitting a dead end wall before continuing down the hole. If you wanted even more power (though I doubt you'll need to do it) you could have the flow angle more slowly into the throttle body. This will help with the turbulence being reduced--you could also rough up the internal structure of the tubes that lead to the throttle body to disturb the laminar flow. This will help maintain airflow velocity.
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