I believe it all depends on position, table dynamics and game flow. If you're in early position and you have a LAGs behind you that will likely raise then limping may be a good move. However if I get into a multi-way pot and I meet strong resistance on a draw heavy board, I will slow down or be ready to release the hand. At the end of the day they are just a pair.

Also if you've been at the table a while then people may be able to get a read on you if you always play the big pairs the same way.