In reply to stp:
Stefano Ghisolfi has three too:
Lapsus F.A. (Repited & confirmed by Ondra)
One slap (Second ascenct after Ondra)
First round first minute (After Sharma, Ondra & Megos)
Surely Megos idiosyncratic approach to hard climbing (he prefers to make quick ascents, 'like 9a+ in two or three tries', than spending a bit more of time on harder climbs) it's the reason behind his 9b scarceness...
Anyway, for sure the 9b club remains a select one, so big congrats to Jackob for the big tick (He's a beast!).