Zion you are proposing that the two or three second gap between where the logo fades to nothingness and the text first appears is eliminated by an invisible dissolve between the two to show the immediate difference (i.e. no "Episode IV"). While this is hypothetically possible, it is rendered improbable by a very important fact:

The clip is already edited for duration to show the logo and text. They do this with a speed ramp. The logo whips on by and then the text soars on up and finally at the last second the clip slows to normal speed to make it clear that it is the text sans Episode IV. Why would they do a fake dissolve if they already did a speed-ramp? If they wanted to get rid of that extra two seconds as you seem to imply they merely had to extend the speed ramp for about 0.0025 seconds. Like four frames of video.

Therefore the idea of them edited the clip to dissolve between the logo and text to show that it is sans Episode IV is illogical--they already edited it with a speed-ramp.