I write a lot about Cosmo's development on here, and not so much about Lychee so far. I feel like this is fairly predictable as she is so much younger and doesn't do much at the moment.
However we have had a fairly major break through recently, and using the YBCR system she is now (at 9 months) consistently recognizing the words 'tongue', 'wave' and 'hi'.
It's a little earlier than Cosmo (not surprising as we got her started on the system earlier) but also a little less consistent than he was. She started to recognise words a month or two ago, but didn't always respond to them and only recognizes a few. Cosmo showed no signs of recognition, but then at around 10 months he could suddenly read with a startlingly wide vocabulary.
Not sure if it's a boy/girl thing, just thought it was interesting to note.
If you are interested in using the Your Baby Can Read system, you can buy it here.