They are worth the wait
Well, TechTV is showing them, and is how I discovered them... in fact it was discovering Thunderbirds (by accident) that caused me to finally attach the digital cable box to the TiVo, then play some games so the analog channels get tuned by the tuner, and the digital stations come through the cable box. (Same "head end" for 2 different inputs)
I also ordered Captain Scarlet, Stingray and Fireball XL5
Sadly Thunderbirds Are Go and Thunderbird 6 seem to be on Region 2 DVD but not Region 1. If I had a PAL to NTSC converter or some software that would deal I'd buy PAL DVDs and convert them myself.