Cold foods during TWW...?

I have been doing some reading about what to do during the TWW to help encourage implantation, and alot of articles and forums are saying to completely avoid cold food and drink. It seems like there could be some truth to this, but really? As if we dont already give up enough. I love a smoothie in the morning for breakfast and I have a hard time drinking water unless its ice cold (granted this is tap water, which is also bad I imagine).

It's just annoying! Like come on already!!

What are your thoughts?