We got our Sofa from Ikea in Murcia, ordered August bank holiday weekend and delivered 2 October, so yes about 6 weeks. Good service and didn't get charged for delivery either.
They give you an approximate date when the sofa arrives at their distribution centre, you then need to ring to organise delivery. Not easy, you need someone Spanish to help with the phone call!
Hope I have helped.
Steve - a chap we met last weekend is nick named "Steve the Ikea man", he would no doubt organise it all for you, we can let you have his number if you like, send me a PM if you want it.
Lindsey