I haven't read anyone else's lj entries about it except my wife's (will now go back and add assenting or dissenting comments as appropriate).
"Everything Changes" - reminiscent of the debut of the new Doctor Who with "Rose", only a year and a half ago; lots of differences, lots of similarities, but on the whole I thought RTD had learnt from earlier mistakes - no problems with pacing, a more confident introduction of the cast (of course, if you have a team set-up, you can have one of your characters formally introduce the rest and remain within the spirit of it). Cardiff may seem a slightly banal place to have the European equivalent of a Hellmouth, but at the same time, does southern California really seem as exotic to its residents as it seems to me? And I loved the line about how the magic paving stone had been affected by a "dimensionally transcendental chameleon circuit". Most viewers will have appreciated it just as technobabble; some of us will have got the in-joke.
"Day One" - I have already glimpsed critiques decrying this as a rip-off of the typical Buffy plot-line of the perils of sex, with the supernatural forces of our setting representing the onrush of adulthood. This is most unfair. The perils of sex are something we always have with us from puberty to old age; it's a universal theme that long predates Buffy and will still be written about long after Buffy and Torchwood are forgotten. The shots of the little piles of dust in the fertility clinic mingled humour and horror in just the right way. Also, both Gwen and Captain Jack are really coming on as simply fascinating people to watch - the camera just loves Eve Myles. Gwen's relationship with Rhys is clearly destined to implode horribly. And I have to say that I have a pretty good idea whose (or rather Who's) hand is in the jar...
Well done to my cousin Brian who is the script editor.
We'll keep watching.