Very! Today was definitely the most crowded I've seen the zoo since last summer.
The crowd viewing the cubs was sizeable, but due to where their exhibit is located and them only being on exhibit in the morning currently it really wasn't that bad overall.
@Andrew_NZP The only busy time I've gone was for the cloudie cubs, ages after they'd been introduced; I got there half an hour before the signed time and still ended up four rows back. Think I'll live through your photos on this one Glad you were able to see them!