teacake, I substantially agree with your observations (13.12, 13.16) but you need to be aware of the cultural background. Would my observation (12.28) be correct - this is a UK based site and the posters will most likely all be native Brits. As a generalisation Brits (the further south the more likely) are known to be very secretive/withdrawn except by formulaic means, hence the dreaded small talk. On the other hand they wish to be seen as friendly, open, etc. as much as any other people and this again leads to formulaic conversation and behaviour, clenched-lip "smiles", etc., all of which is sometimes a source of conversation among non-Brits. Brits react very strongly when any of this is mentioned.