The bad part is that you can't help but make comparisons... even when you don't want too. People can see how much slower, smaller, clumsier, etc. she is than her sister. I think sometimes that shines a spot light on some of her issues. For the most part we don't see it but it always there under the surface.
It has been amazing lately how much the size difference is becoming obvious. The girls have ebbed and flowed throughout their life. Sometimes Grace looks like a giant by comparison. Other times they look closer in size. Lately Grace is seriously gaining ground and Abby has stagnated in her growth. Thankfully she has stopped minding the fact that she is so tiny. For a while it really bothered her but she is starting to see that being tiny means very little... especially when you have a personality as big as hers. :D
At Birth - Abby 4 lbs 14 oz and Grace 5 lb 14 oz