Yes, I meant the inverse of what I wrote. But the whole thing is still untenable, even assuming that phaser beams are very slow in normal time.
Let's arbitrarily say that a phaser beam travels normally at 500 meters per second (or 0.000001666 times the speed of a flashlight beam) in air, versus 850 meters per second for a rifle bullet. If the phaser beam sidestepped by Deela travels at 3 meters per second, then the acceleration is a factor of 167. Let's assume that all the activity of the Scalosians until they are foiled (setting up the deep-freeze device, Kirk and Deela's bedroom time, etc.) takes what they would perceive to be 12 hours. That would mean that Spock plays back the Scalosian distress call at various speeds, then plays back Kirk's tape (after figuring out the proper playing speed), and McCoy isolates the accelerating agent consumed by Spock, all within 4.3 minutes. That's at least as implausible as slower-than-bullets phaser beams.
Let's arbitrarily say that a phaser beam travels normally at 500 meters per second (or 0.000001666 times the speed of a flashlight beam) in air, versus 850 meters per second for a rifle bullet. If the phaser beam sidestepped by Deela travels at 3 meters per second, then the acceleration is a factor of 167. Let's assume that all the activity of the Scalosians until they are foiled (setting up the deep-freeze device, Kirk and Deela's bedroom time, etc.) takes what they would perceive to be 12 hours. That would mean that Spock plays back the Scalosian distress call at various speeds, then plays back Kirk's tape (after figuring out the proper playing speed), and McCoy isolates the accelerating agent consumed by Spock, all within 4.3 minutes. That's at least as implausible as slower-than-bullets phaser beams.