It's not just dyslexia. I worked for years in typesetting, and there is solid research about the human eye's need for a balance of type vs white space and the effects of different ratios.

Really it just depends on whether you want ppl to read your best thinking, or react to the first sentence and swing at you from there. If it feels like ppl aren't bothering to read your whole post-- that nmay be due to basic physiology we all share... rather than a character flaw to attack.

~S~