I started 4 White Rhino seeds a while back, and 3 turned out to be male. The other is doing fine. They are definitely smaller than more Sativa-dominant strains. My AK-48s (also planted 4, and 3 of THOSE were male too, booo) were roughly twice the size. Once I'm past the using-seeds stage (e.g. after these two females are done), I'll probably go with 3 or 4 AK-48s to stock up on bud, then try 3 or 4 White Rhinos and give them a fair bit longer in veg to bulk up. To put in perspective the difference between those two strains, the White Rhino has about 8 bud sites (I am SCRoGing), while the AK-48 has around 20, yet both were planted at exactly the same time. I'm hoping for maybe 12 bud sites on the WR before all is said and done, and I might hit 30 on the AK-48. (I would have waited for flowering, but I'm going to Bonnaroo in June, so waiting wasn't really an option.)