Well, our visit is now only just over a week away, and I have to say that many of the replies to my original post haven't filled me with confidence about it. Many people seem to think I expect much more of DGD than I actually do (eg notanan2 "... expecting fondness on demand" or " "You want a 4 yr old to demonstrate to you that she knows & likes you but really you do sound like you approach it like its hard work, which it is but because of your approach not because of time zones or language"). Also many seem to assume I haven't tried to engage with her in the past : we've done drawing, story time, building things, baking, playing with bubbles, going to look at animals in the local park, doing puzzles, taking her to and collecting her from daycare (looking at nature etc on the way), playing in the park, pretend play at home (eg doctors and nurses) ... the list goes on. All I was really looking for was a bit of empathy with our situation (which was what I thought, obviously mistakenly, GransNet would be all about) and possibly hearing from others in similar situations (thanks to those who've seen this and responded accordingly). Just to be clear : Skype is not the same as a cuddle, it's a very poor substitute, but I realise that most of the time that's all that's available and have to make do - DS and DiL do all they can to make Skypeing into a good experience, but we don't try to force DGD to interact - we don't expect interest/engagement on demand - we're not entirely clueless or pushy in this respect!
Don't think I'll be posting on GransNet again, sorry!