Last time I shopped with Ideal World it was the low rent parcelnet, but that was quite a while ago. Sometimes deliveries come direct from the manufacturers.:3:
Depends how big it is.
If it weighs more than 17KG it won't be parcelnet.
(well it might, but it will get lost in the system if a sensible courier decides to refuse to take it as it's oversize).
I think like most companies, they use more than one courier company so they aren't putting all their eggs in one basket.