I also noticed that sideways Jin spoke "Thank You" clearly with no accent. Also, 2007 Jin is speaking English more fluently as well. No accent, no struggle to find the right word.
2007 Sun is able to understand English, and write it, but not speak it at the moment..... is she regressing to sideways Sun, or is it really just short term?
Florimel: Time would certainly explain the convergence of 2004 sideways with 2007 Losties........ I might be standing behind you now. Looks like I will be floating for awhile.