Note for North American members... Handy = smart phone... Lol
To answer your question, it depends.
I use a dedicated Android phone and the ALP app is the only thing running so there is no delay (technically a small, imperceptible delay).
I have seen some posts that seemed to indicate that some members have experienced a delay. As I recall, an IPhone had some issues, but I think it's also the way the app works on iOS that may be part of the issue.
Thank you, drtoddw and Alfa driver.
I will buy an Android only for the ALP app. Now with the ALP app on my "normal" Handy/smart phone with all the other applications running, I'm quite sure that there is a delay. I tested it several times by passing the same Traffic Observer with and without the ALP app.
I like the ALP Connect. But I was considering buying the HIFI Module, which I will not do after your response.