I ride a frame made with 6/4 ti, with at least two of the three main frame tubes seamed. Don't hate the seamed tubing; hate the seamy manufacturing process.
That said, I'd sure like a frame made with Reynolds 6/4 seamless tubing.
The whole seamed versus seamless comparison is valid to a point. It was an old sales pitch used to get customers on more expensive bikes under the generally valid pretense that seamed tubing was stronger, generally lighter, and provided a better ride. With time and improved manufacturing techniques, this argument has become less important but is still not completely invalid. Seamed tubing has its merits and there are those who might argue that True Temper's claim to get more consistent wall thickness with seamed construction is also a marketing ploy. Reynolds marketing and Reynolds proponents may take exception to that claim. Choose your weapons.
