Really? I would consider haveing only 1-2 WIPs at a time to be progress. I usually have anywhere from 5-10 WIPs, in various stages.

That's just how my brain is. I get a great idea that won't leave me alone until it's out in text, and then partway in, it just kind of fizzles. I have one story that's been woefully neglected for over a year and I'm still getting reviews hoping that I'll post a new chapter soon.