Fortunately for Borders the problems weren't nearly as bad as B&N. I did some checking on twitter and only 3 people complained about Borders servers. All 3 complaints were from 25 December. That's actually not all that bad (especially when compared to B&N).
Just to be fair I checked Twitter for complaints about Kobo and I found 7 first hand accounts (I'm ignoring the retweets and news stories). All date from 25 December.
You're probably going to read a bunch of tweets and articles this week about how Kobo's servers crashed over Christmas. I don't think crashed is the right word.They had trouble on 1 day and were working just fine the next. That's hardly a blip, much less a crash.
BTW, I'm still seeing first hand tweets about the B&N servers still being down. Now that's a crash.