Just in case, it is normal if the site is slow since a few hours and for the next few hours. I upgraded the phpbb forum of my site (running on the same server as imcdb) and now it is reindexing messages.

edit: done now

Right now it seems to work and I see nothing special in the processes running on the server.
Pages come a little slower than usual maybe (or it is the wifi on which I am), it may be Google or another search engine crawling the site (or peak in visits), we'll see how it evolves (though that I don't really know what I could do :D)

Is it me or is the site really slow right now? (Early in the morning here, mid/late-morning Euro)

The company hosting then site (OVH) had a major electricity problem with their routers this morning, maybe it was related (emergency power supply didn't work when a power failure occurred)

Same

It works now.

Same

I can't seem to access the site.

Well we did have internet issues earlier on the US east coast, but they should have been resolved by that time. Was not having issues at other sites at the time, but most of them were US-based sites, not Euro.

So Between 19:00 and 22:00 CET, that's indeed one of the "busy" time of the site.
I'm still not sure what cause occasional slowdowns. I hesitate between the old phpbb2 of my own site (running on the same server) that is not very optimized and some robots harvesting pages of the site, or maybe a mix of both.