Helm is out, and defensemen hardly showcase speed unless they're going from end to end
I'll give you Nyquist, but the rest...
Datsyuk isn't a burner, but he makes up for it with his defense and stick handling
Alfredsson has good wheels for a 41 year old, but certainly is not a burner.
Bertuzzi - Slow
Franzen (out) - Slow
Andersson - Slow
Miller - Average
Glendening - Average
Cleary - Slow
Jurco - Not sure yet, looked pretty quick
Sheahan - Average/slow
Samuelsson - Slow
It matters when you're playing dump and chase... But getting beat to most pucks and losing battles. They're icing what they can with injuries, but you can't possibly think this team is quicker than even 1/3 of the league. It shows on most nights.
Back in the 2004 allstar game datsyuk was in the fastest skater competition and had a fairly good time. He's not that fast anymore but still above average getup in the league.
Jurco is deceptively fast. He catches people by surprise because he doesn't look like he's making a huge effort to move his feet like someone like helm or draper, but when you look at how much ice he covers you're surprised. Plus he's one of the rare kinds of players that's faster with the puck on his stick.
Sheahan is slightly above average when he hustles.
Alfredson isn't as fast as he was 5 years ago but makes up for it with smart play.
Franzen, when he feels like it, has above average wheels. Look at how he played when he was a 3rd line pker.
The rest of the players on your list can go kick rocks after this season as far as I'm concerned. Andersson has value as a trade chip, but the rest are just warm bodies that don't make any impact any more.