... is there just more crunching going on?

I normally pay very little mind to Boinc, other than just allowing it to 
keep on doing it's thing, but just noticed that all my computers (Win and 
Linux) are now crunching "setiathome_enhanced" WU's for the last few weeks.

Completion time for the "setiathome_enhanced" WU's is much longer than what 
they were all crunching before.

Just curious...