for the record, ebay grading has significantly improved for a lot of terrible sellers since the advent of the DSRs (detailed seller ratings, the star system). they have been the only thing keeping sellers' status on ebay. ebay is changing it again so that they rate sellers based on returns and refunds, which i think will loosen the grading once again.
i don't think anything is new. there always have been conservative and non-conservative graders. you have to look at the listings for clues (e.g. compare the label condition to the vinyl condition and see whether it looks like a "VG+" record). my only observation about US vs. UK graders is that UK graders tend to be either extremely conservative or extremely liberal with their grades while there is a wider range of standards with US sellers.
i agree about many sellers using poor packaging but i still can't believe that the standard of mailing in the UK is a thin envelope mailer with a single totally flexible thin pad inside. I've gotten plenty of cracked records from the UK with that packaging. in the last few years i have experienced more US sellers skimping on packaging to save a few cents -- for example, using real 45 mailers but no filler pads, which makes a record extremely crackable in shipping.