Can't compare with Sencha Touch, but the one app I built with jQuery Mobile started out okay, and seemed to be saving us time at the prototyping stage. We also

Can't compare with Sencha Touch, but the one app I built with jQuery Mobile started out okay, and seemed to be saving us time at the prototyping stage. We also hoped it might save time later by reusing the same codebase on both iOS and Android. The reality was that though it helped while prototyping, it required workarounds to do anything more complex than the token tabs+list-view/sub-view style app, and we ended up disabling all of jQuery Mobile's transitions and effects in order to get it to be performant (BIG difference there!). In the end, I'd say the costs outweighed the benefits in our case. Next time, I'll just use one of the more general-purpose JS frameworks and custom style the UI myself.