A few of my friends have rushed to turn their babies FF.
What really annoyed me was one of my friends went to Mothercare in Glasgow to get her 3 yr old a new car seat and while there the assistant asked if she needed a new seat for her then 10 month old who was in a Maxi Cosi baby carrier in the trolley. The assistant told my friend she should have moved LO as soon as she could sit unaided and talked her into buying a FF seat for the 10 month old!!
I seen them a few days later and was shocked to see LO in the FF seat and asked why when she was well under 9kg and as she is very petite had plenty of space left in the carrier. My friend explained what happened and I was so angry. I told her what I knew (from here) about the importance of RF and sent her a few links to read. I dont know if she did read them or not but she kept LO FF and now at 14 months she still isnt 9kg so could still be in the carrier!!
Another of my friends has the same Britax seat as us and turned her LO when he was 9 months even though our seat does RF up to 13kg. He is tall and she said about his legs being crushed, me response was "whats better, broken legs or neck!?" Again she kept him FF, her reasoning being its a faff to turn the seat back round and easier to strap him in when FF! WTF?! Yes it is but id rather take an extra 20 secs to strap LO in than have their head ripped off in an accident!