Indeed, I can confirm that when having ShowDelay set, it is not respected if the tooltip is shown by the client-side show() method and this is by design (the same for HideDelay and hide()) because when the user calls show() (hide()) it is expected that the action happens immediately.
The user has the ability to show the tooltip whenever he wants and also using the setTimeout function is a really simple manner to achieve the same result as using ShowDelay.
This being said, in order to get the desired result you should modify use code e.g similar to the following:
tooltip = tooltipManager.createToolTip(node);
The above code is equal to ShowDelay="5000". Note, also, that if you want to programmatically show a tooltip, you should also set ShowEvent="FromCode".
I hope that my reply is detailed enough and helpful, let me know if any additional questions arise.
the Telerik team
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