ATC will probably have told you what speed to fly and squeeze you in so seperation may be down to minimums.
BelArgUSA is making his point about wake down the ILS so you will have set the bug speed by then for landing. if he lands behind the touchdown point of the aircraft before him, its wake will still be there as it would have sunk down onto the ground.
to avoide the wake of the aircraft before you, you land after its touchdown point therefore being above its wake turbulance all the way down the ILS as your alwase higher than it.