Significantly Lower CTR from Google Traffic

[Coleman123]

I have been monitoring my Adsense income closely for several months now with attention to the "Adsense eCPM" metric. This dimension is actually within Google Analytics reporting of Adsense income.

With a large sampling of "adsense page impressions", no less than 250,000 impressions per traffic source, I am seeing Google organic traffic earnings consistently falling well below every other comparable source.

For example, two other big/popular search engines that make up a large portion of my traffic earn 50% higher "Adsense eCPM".

Google's traffic averages lower numbers with both CPC average and CTR average.

Do others see this significant difference? Any ideas why this is happening?

[netmeg]

Interesting; my earnings from Google traffic tend to be higher than any other channel.

But it might depend on your niche - for example, tech users who come in via Google may be less prone to click on ads.