[DemonDeac]

It may well. It is a crutch. Just like spell check has harmed our ability to spell.

[AnAmericanMother]

Spell check hasn't really had much effect on me . . . but you know what did? Stenography class. That will mess up your spelling BUT GOOD until you can get it in a separate compartment in your brain and lock it down.

I can see how txt msgs have really caused spelling to decline . . . it's the same principle as shorthand.