Couple of points..
1. Unfortunately the A380 uses Capton insulation aswell, albeit with a secondary cable sheathing underneath. Still makes me shudder to think when I recall the fire damage that arcing Capton can create.
2. The A380 seems to taxi ok to me..got through this lot alright..seriously the taxi issues are completely bogus.
3. Yes it is primarily the cabling thats causing the delays....
