I've noticed this happens more on my Ted segments than on my mainline segments. I'm not sure if this has to do with Ted's LCC-type image and branding or if it would happen anyhow given the high percentage of leisure travelers on the Ted routes. If there's one positive that's come out of the liquids ban (and this would appear to be the ONLY one), I've noticed that overhead bins are a lot less full recently. It makes boarding in group 1 that much less urgent.