Posting a reply in a thread is slow

Hi guys.

Since I couple of days, I have the feeling that replying to a thread is much slower then first. It takes up to 5-6 seconds to post my reply instead of instant. I've tried this at my work, at home and at my father-in-law's place.
I've waited a couple of days to report this, just in case it was something temporary.

Was there a recent change? Maybe it is between my ears, but I thought reporting this wouldn't hurt.

Thanks and kind regards,
Derk Weijers
IronRain