soodude,
I have a sub-penthouse corner unit, which is the same layout as the penthouse unit, but with the wrap-around balcony. My PDI isn't until end of this month, but I will try and take pictures and post here if I can, if that helps any. My uncle works for the builder, and he says that the layouts are nearly 100% to the drawing's specifications, if anything, the sq. footage increased from the brochure (depending on how old the brochure you have is).
One thing though: I do know that my mortgage company's appraiser did go into the building to try and gain access to my unit to do his appraisal, they did not let him go up. So I don't think you could walk in and try and get a viewing, don't waste your time if you had that in mind!