Is this normal?

[mosnas]

So recently I have made a very big effort to hit down and through the ball (Before my irons were super wide sole so I always had a sweeper style) anyways recently I have found that on all my clubs I have added 10-20 yards.  The ball flight is not low enough for me to be dramatically delofting my club at impact.  I was just wondering If this is normal or if I am doing something wrong.

[Stretch]

No, sadly it's not normal to suddenly gain 20 yards with all your irons. You should be very, very happy!

[MEfree]

Does contact feel better?  Do you feel like you are compressing the golf ball more?  These are things that add distance in a good way.

Not sure you why you are worried about doing anything wrong unless you are hitting it more crooked or inconsistent.