Jean-Luc, it takes 17 minutes to scan the blockchain on my odroid-xu:
[2014-02-06 20:21:40.352] DEBUG: Database cache size set to 253440 kB
[2014-02-06 20:21:44.208] Database is at level 6
[2014-02-06 20:21:44.215] Updated database is at level 6
[2014-02-06 20:21:44.252] Scanning blockchain...
[2014-02-06 20:38:09.239] ...Done
[2014-02-06 20:38:09.246] NRS 0.7.0e started successfully.
On the old version with .nxt file it took only 9 secounds...