You're both wrong.
Jaguar DID improve drastically under Ford ownership, especially in terms of quality, anybody who thinks otherwise simply doesn't know squat about the car industry.
Actually, I'm not wrong...not in the slightest. Ford's ownership of the company cheapened the brand, and while it improved sales of the cars (by bringing more models to the US market and asian markets) and by lowering the cost of production (but slapping ford motors and other parts all over the vehicles during manufacturing), they did not have a positive influence on the brand, they just made the sale increase. The brand itself staggered with resale values, customer satisfaction, reliability (though Jaguars past reliability was sketchy at best BEFORE Ford, so i don't know that it made that big of a difference negatively if at all).
Ford took Jaguar and saved them from death by making their cars more readily available and cheaper to make...these two things do not go hand in hand with positive movement of the brand, and since the selling in 2008, Jaguar is returning to it's heyday...inside production, higher quality parts and processes, and a more memorable experience with luxury and performance.
I'm a car nut...I spend a pretty ridiculous chunk of my time just reading and talking about them, so before you come in and call someone wrong, think about what you're saying first. Improvement comes from a SUBSTANTIALLY wider spectrum than just sales figures, which Ford was successful at, but at the expense of diminishing the brand itself a bit. People were very afraid of this when it came to VW's control of Porsche, but so far, all it's really done is brought the idea of more accessible brand, which is a good thing.
And i apologize for derailing the thread...but the car talk is infinitely more interesting than the almost moot discussion about the GS4 and a yet to be previewed new iPhone.