Yes. I think the effect would be relatively minor in the above case (splitting the days but keeping the existing set and rep scheme) but would be much more pronounced if you were to more radically alter the distribution of volume. For example shuffle around the order of the sets within a single training session (zig zag instead of pyramid), shuffle around the order of sets between training sessions (dividing a single day of deadlifting across 6 training sessions), change the distribution of reps between sets (performing 80% for two sets of five reps instead of five doubles), change the distribution of reps between training sessions (perform all my sets of 50% for the week on Monday, all my sets of 60% for the week on Tuesday, all my sets of 70% for the week on Wednesday...).
These are the most extreme examples and I use them only for the purpose of demonstration. Obviously total volume expressed as tonnage (to factor in both number of lifts and intensity) is going to be the most fundamental training variable, but it is not the only training variable. There are limits to how far we can take it.
Ok, now I see!
I never intended to do it that way, but you're totally true! All the volume for 7 days in 1 Session would be as detrimental as splitting it over 7 days. The middle way would be the way to go, I agree.
But, as mentioned, I never intended to split it up like this. The Reps/Sets/% would be the same for the several days.
Ie. if week2, Day 1 calls for
Squat 5x50%, 4x60%, 3x70%, 2x4x80%
Bench press 5x50%, 4x60%, 3x70%, 2x5x80%
Squat 3x55%, 3x65%, 3x4x75%
I'd do instead;
Day 1
Squat 5x50%, 4x60%, 3x70%, 2x4x80%
Squat 3x55%, 3x65%, 3x4x75%
Day 2
Bench press 5x50%, 4x60%, 3x70%, 2x5x80%
So even if we would say that it perhaps has an effect, will that negatively affect the long term gains? Due to no one can give us a clear answer, I'd just guess; if it'll negatively affect the gains, it'll be a minor one. Especially if you think how we progress on Sheiko. If the weights feel light after a cycle, we increase the weight, so even if we wouldn't be pre-fatigued by a set before the (in this example) bench, in the long term we might handle a bit heavier weights because the last cycle felt to easy and in the end, get the same stimulus out if it as if we were pre-fatigued.