Done several test, but can’t give a general recommendation as my results seem to depend a lot on the niche I’m targeting.

In general, I could say outside IM it’s easier, although other (softer?) rules as within IM apply.

In the IM niche it’s hard to tell. Sometimes 50% rave about what the other 50% run down.

On a test I’ve tested using a call to action type of title for articles. The result was, average increase in article views going up about 100%.

I don’t know if the topic of the article or the call to action that matters, but I strongly believe this has something to do with call to action.

Have you ever done the same tests?