They've actually been bringing up the rear -
Rasmussen Polls Were Biased and Inaccurate; Quinnipiac, SurveyUSA Performed Strongly - NYTimes.com
The only study that produced a favorable analysis of Rassmussen polling in 2008 (none exist for any other election cycle) was conducted by a Fordham University political science professor who based his survey of polls on incomplete election totals. They claimed the "final" margin as Obama + 6.15% when his actual final margin was 7.3%. Once the actual numbers were finalized, Rassmussen was middle of the pack on nation-wide numbers for 2008. Their 2008 statewide numbers were horrible. and in 2010 ... they were aweful.
Check the record yourself ... don't take anyone else's word on it.
Did you know that Nate Silver's FiveThirtyEight is partnered with Rasmussen? Which makes the article you cited rather curious. But anyway, the 2010 election was not a presidential election and I don't much pay attention to polls in the off years. Rasmussen was the most accurate in 2008 and I hope will be again in 2012.
No, Rassmussen was not the most accurate in 2008.
Final Results -- -- -- 52.9 45.6 Obama +7.3
RCP Average 10/29 - 11/3 -- -- 52.1 44.5 Obama +7.6
Marist 11/3 - 11/3 804 LV 4.0 52 43 Obama +9
Battleground (Lake)* 11/2 - 11/3 800 LV 3.5 52 47 Obama +5
Battleground (Tarrance)* 11/2 - 11/3 800 LV 3.5 50 48 Obama +2
Rasmussen Reports 11/1 - 11/3 3000 LV 2.0 52 46 Obama +6
Reuters/C-SPAN/Zogby 11/1 - 11/3 1201 LV 2.9 54 43 Obama +11
IBD/TIPP 11/1 - 11/3 981 LV 3.2 52 44 Obama +8
FOX News 11/1 - 11/2 971 LV 3.0 50 43 Obama +7
NBC News/Wall St. Jrnl 11/1 - 11/2 1011 LV 3.1 51 43 Obama +8
Gallup 10/31 - 11/2 2472 LV 2.0 55 44 Obama +11
Diageo/Hotline 10/31 - 11/2 887 LV 3.3 50 45 Obama +5
CBS News 10/31 - 11/2 714 LV -- 51 42 Obama +9
Ipsos/McClatchy 10/30 - 11/2 760 LV 3.6 53 46 Obama +7
ABC News/Wash Post 10/30 - 11/2 2470 LV 2.5 53 44 Obama +9
CNN/Opinion Research 10/30 - 11/1 714 LV 3.5 53 46 Obama +7
Pew Research 10/29 - 11/1 2587 LV 2.0 52 46 Obama +6
RealClearPolitics - Election 2008 - General Election: McCain vs. Obama
You see Rassmussen missed the final results by 1.3
Five polls on this list did better.
In the state polling they were MUCH worse.
And if you want to hang your hat on Rassmussen, you are very wise to ignore 2010.