Yep. You're correct. Looks like there has been a decent amount of powering up. Unfortunately, I don't know an easy way to look at who did the power-ups, but here's what I see for power-up + interest during the week:

Those numbers aren't exactly right because the powerdown numbers are aligned with calendar date in the GMT timezone, but I collect the daily vesting info during the early afternoon US/Eastern. It's a reasonable approximation, though.