I have to agree. I've no objection to adverts, I recognise that poor El Reg Hacktards have to eat, and therefore us commentards have to stare at ads.
However I do object to starting to read an article, and then having it suddenly scroll zoomingly past my eyes at supersonic speed, as some advert up top has decided to go walkabouts.
The ones that really piss me off, are the ones that come down like a curtain over everything you're reading, and force you to click on a close button. They were fashionable a while back, and should that ever come back, my patience will snap and I'll use an ad-blocker. Which I currently don't. At which point it'll probably be too much hassle to train it for which sites deserver to go un-blocked.
I've done a quick bit of research. I'm running Vista on this office PC. In IE10 the ad doesn't randomly expand all over the page, it sits in its box like a good little Toshiba. In both Chrome and Firefox (latest versions), it loads up normally, has a little think, waits until you're not expecting it, and are reading the article. Then: Boo! Zoom! Whoosh! Bugger!
There seems to be a distressing tendency at the moment for web pages to jump around like epileptic fleas as they load. I don't know if this is a change in the way that browsers work or just the number of elements and bits of media from different servers that web-designers are trying to throw out. It used to be that you could load a page, and start reading the article, then other stuff would gradually turn up around the page. Now the whole thing seems to want to jump to whichever element has just loaded. This is something I particularly notice on the iPad browser. Some pages are unreadable for a whole minute, as they bounce around madly.