Guys, I don't know what you have been reading but Bay Trail is every bit as fast as Tegra 4 and in some benchmarks even faster. Bay Trail tablets will not be as slow as the old Atom tablets.
In Geekbench testing, the Intel Baytrail T chips (byt_t) were nearly identical to the Tegra 4 in single and multi-core scoring. Both ran a variant of Android 4.2 — 4.2.2 for the Intel chip, 4.2.1 for NVIDIA — and similar amounts of memory. The Baytrail T was clocked at an impressive 2.39GHz, whereas the Tegra 4 was checked at a respectable 1.9GHz.
Perhaps the real turning point was multi-core floating point operation, where the Intel chip simply blew the Tegra 4 away. When it came to single-core operation, the Tegra took the edge, but only slightly. The Baytrail chip also outclassed the Tegra 4 in memory processing.