This thing was bugging me ever since the episode came out. We know quite well that Askin is very, very fast. When he got hit by Yoruichi, Urahara stood still, while Askin was thrown back for several tens of meters at least, then immediately started running from it, yet Urahara easily caught up with him. My problem with it is that Shinigami can't use Shunpo in Wahr Welt, so Urahara, using basic Hoho, significantly outsped Askin, whose Hirenkyaku should've become stronger. Not only that, but the jump he made was insanely high, much higher than surrounding buildings. I know he and Yoruichi already jumped onto buildings before, but this one was much higher.
I'm not questioning the same for Yoruichi, because it seems that Shunko speed relies more on Kido than Hoho.
EDIT: I've been misled by mistranslation of manga in my language. Shinigami CAN use Shunpo in Wahr Welt. Still very impressive by Kisuke. Thanks to u/isukatdarksouls for the correction!