Yes it absolutely is if you write the tweets while you actually do the thing.

Writing a blog post would require you to do the same, but not share while you are going through the experience (so no helpful replies from your followers etc), then having to edit (as blog def requires something a bit more polished) and post it on the blog that you need to run or have run for you some way. And then you would need to somehow get people to actually read that still.

So I totally believe them (besides believing them they are telling me their valid view in the first place).