I'm actually liking the big letters, it makes it easier to read and less eye strain. I always found it pretty stupid to think all caps means shouting. I think when you're typing normal AND YOU START TO YOU CAPS, that the shift from lower case to upper could emulate shouting through text. The same thing goes for font size, small to large, but if they're consistent then to me its fine.
The Only Thing That Ever Bothers Me Is When People Talk Like This. I Really Can't Stand It At All. I Can't Even Stand To Type Like This. When I Read Text Like This My Brain Has Slight Pauses With Each Word, I Guess Assuming Because Of The Capital Letter That A New Sentence Is Starting.